Post on 08-Mar-2018
SystemIndoor Unit SERVICE MANUAL R410AMODEL : ARNU Series URNU Series
CAUTIONBefore Servicing the unit, read the safety precautions in General SVC manual.Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
R410A
- 2 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Air Conditioner Service Manual
TABLE OF CONTENTS
Part 1 General Information .......................................................................................................3
Model Names ...............................................................................................................................4
External Appearance ...................................................................................................................5
Nomenclature ...............................................................................................................................6
Part 2 Indoor Units ......................................................................................................................7Ceiling Mounted Cassette Type (1 way) ........................................................................................8Ceiling Mounted Cassette Type (2 way) ......................................................................................16Ceiling Mounted Cassette Type (4 way)(1)..................................................................................21Ceiling Mounted Cassette Type (4 way)(2)..................................................................................27Art Cool Type(Mirror) ...................................................................................................................34Art Cool Type(Gallery) .................................................................................................................45Ceiling Concealed Duct Type (Low static) ...................................................................................55Ceiling Concealed Duct Type (Built in) ........................................................................................61Ceiling Concealed Duct Type (High static) ..................................................................................67Wall Mounted Type ......................................................................................................................76Ceiling & Floor Ceiling Suspended ..............................................................................................87Floor Standing Type.....................................................................................................................94Vertical Air Handling Unit ...........................................................................................................101
Part 3 Trouble shooting guide...............................................................................109
- 3 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Part 1 General Information
1. Model Names .............................................4
2. External Appearance .................................5
3. Nomenclature .............................................6
Model Names
- 4 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Model Names
h *ART COOL- SE/S8( * R:Mirror, V:Silver, B : Blue), SF(* E:Red, V:Silver, G:Gold , 1: Kiss (Photo changeable))*Wall Mounted- A: Basic, L:Plasma, *Ceiling Cassette- A: Basic, C:Plasma
Category ChassisName
Capacity(Btu/h(kW)) 7.5
(2.2) 9.6
(2.8) 12.3(3.6)
15.4(4.5)
19.1(5.6)
24.2(7.1)
28.0(8.2)
30.0(8.8)
36.2(10.6)
42.0(12.3)
48.1(14.1)
54.0(15.8)
76.4(22.4)
95.5(28.0)
Wall Mounted(General)
SE ARNU073SE*2
ARNU093SE*2
ARNU123SE*2
ARNU153SE*2
S5 ARNU183S5*2
ARNU243S5*2
ARTCOOL
Mirror SE ARNU07
3SE*2 ARNU093SE*2
ARNU123SE*2
ARNU153SE*2
S8 ARNU183S8*2
ARNU243S8*2
CeilingCassette
1 Way TJ ARNU073TJ*2
ARNU093TJ*2
ARNU123TJ*2
2 Way TL ARNU183TL*2
ARNU243TL*2
4 Way
TR ARNU073TR*2
ARNU093TR*2
ARNU123TR*2
TQ ARNU153TQ*2
ARNU183TQ*2
TP ARNU243TP*2
ARNU283TP*2
TN ARNU363TN*2
TM ARNU423TM*2
ARNU483TM*2
CeilingConcealed
Duct
High Static
BH ARNU073BHA2
ARNU093BHA2
ARNU123BHA2
ARNU153BHA2
ARNU183BHA2
ARNU243BHA2
BG ARNU283BGA2
ARNU363BGA2
ARNU423BGA2
BR ARNU483BRA2
B8 URNU763B8A2
URNU963B8A2
Low Static B1 ARNU07
3B1G2 ARNU093B1G2
ARNU123B1G2
ARNU153B1G2
B2 ARNU183B2G2
ARNU243B2G2
Built In B3 ARNU07
3B3G2 ARNU093B3G2
ARNU123B3G2
ARNU153B3G2
B4 ARNU183B4G2
ARNU243B4G2
Ceiling & Floor VE ARNU093VEA2
ARNU123VEA2
Ceiling Suspended VJ ARNU183VJA2
Floor Standing
With Case CE ARNU07
3CEA2 ARNU093CEA2
ARNU123CEA2
ARNU153CEA2
CF ARNU183CFA2
ARNU243CFA2
WithoutCase
CE ARNU073CEU2
ARNU093CEU2
ARNU123CEU2
ARNU153CEU2
CF ARNU183CFU2
ARNU243CFU2
Vertical AHUNJ ARNU18
3NJA2ARNU243NJA2
ARNU303NJA2
ARNU363NJA2
NK ARNU423NKA2
ARNU483NKA2
ARNU543NKA2
External Appearance
- 5 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. External Appearance
Wall Mounted
ART COOL Mirror
Ceiling Cassette- 1Way
Ceiling Cassette- 4Way
Ceiling & Floor
Ceiling Suspended
ARNU073TJ*2 ARNU093TJ*2ARNU123TJ*2
Ceiling Cassette -2WayARNU183TL*2ARNU243TL*2
ARNU073TR*2ARNU093TR*2ARNU123TR*2ARNU153TQ*2ARNU183TQ*2
ARNU243TP*2 ARNU283TP*2ARNU363TN*2ARNU423TM*2ARNU483TM*2
Ceiling Concealed Duct - Low StaticARNU073B1G2 ARNU093B1G2ARNU123B1G2
ARNU153B1G2ARNU183B2G2ARNU243B2G2
ARNU073SE*2 ARNU093SE*2ARNU123SE*2
ARNU153SE*2ARNU183S5*2 ARNU243S5*2
ARNU073SE*2 ARNU093SE*2ARNU123SE*2 ARNU153SE*2ARNU183S8*2ARNU243S8*2
ARNU093VEA2ARNU123VEA2
ARNU183VJA2ARNU243VJA2
Floor Standing With caseARNU073CEA2ARNU093CEA2ARNU123CEA2ARNU153CEA2ARNU183CFA2ARNU243CFA2
Without caseARNU073CEU2ARNU093CEU2ARNU123CEU2ARNU153CEU2ARNU183CFU2ARNU243CFU2
Vertical AHUARNU183NJA2 ARNU243NJA2 ARNU303NJA2ARNU363NJA2ARNU423NKA2 ARNU483NKA2ARNU543NKA2
Ceiling Concealed Duct - High StaticARNU073BHA2ARNU093BHA2ARNU123BHA2ARNU153BHA2ARNU183BHA2ARNU243BHA2ARNU283BGA2
ARNU363BGA2ARNU423BGA2ARNU483BRA2URNU763B8A2URNU963B8A2
Ceiling Concealed Duct – Built-inARNU073B3G2 ARNU093B3G2ARNU123B3G2
ARNU153B3G2ARNU183B4G2ARNU243B4G2
* A:Basic, L:Plasma* A:Basic, C:Plasma
* A:Basic, C:Plasma
* A:Basic, C:Plasma
* R:Mirror V:Silver B : Blue
Nomenclature
- 6 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Nomenclature
ARN U 307 ATJ 2
Generation
Chassis Name
Electrical Ratings
1:1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz6:1Ø, 220 - 240V, 50Hz 7: 1Ø, 100V, 50/60Hz3:1Ø, 208/230V, 60Hz
Total Cooling Capacity in Btu/h Class EX) 18,000 Btu/h Class → '18'
Combination of Inverter Type and Cooling Only or Heat PumpN: AC Inverter and H/P V: AC Inverter and C/OU: DC Inverter and H/P and C/O
System with Indoor Unit using R410A
❈ LGETA:U Ex) URN
Combinations of functionsA: Basic function L: Neo Plasma(Wall Mounted)C:Plasma(Ceiling Cassette) G: Low Static U: Floor Standing without CaseART COOL Type Panel ColorB:Blue R:Mirror V: Silver
- 7 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Part 2 Indoor Units
Ceiling Cassette1 Way.................................................................................82 Way...............................................................................134 Way(1)...........................................................................204 Way(2)...........................................................................23
Art Cool SeriesART COOL Miror..............................................................34ART COOL Gallery ..........................................................45
Ceiling Concealed DuctLow Static ........................................................................55Built In ..............................................................................62High Static........................................................................67
Wall Mounted(General)Wall Mounted ...................................................................76
Ceiling & FloorCeiling & Floor Ceiling Suspended...........................................................87
Floor StandingFloor Standing..................................................................94
Vertical Air Handling Unit................................................117
- 8 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ......................................................................................9
2. Operation Details........................................................................10
3. Dimensions .................................................................................12
Ceiling Mounted Cassette Type (1Way)
- 9 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Functions
1. Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Airflow Direction Control
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pip-ing temperature will be reached at 25°C(76°F).
Compact and light design • To install a unit is very convenient because of smallersize than textile.
Low noise• The most advanced low-noise design.• The adoption of turbo fan and round type heat exchang-
er give the quietest operation.
Long life filter • Long life wrinkle(type) and washable and anti-bacteriafilter is adopted.
High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm(27-9/16inch) is
possible.
High-Ceiling corresponding Function • According to the height of ceiling, the RPM of indoor fanmotor is selected to increase air reaching distance.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• Jet, High, Med, Low, Lolow
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
- 10 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Detail
n Auto Swing Control• This function is to swing the louver up and down automatically.
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
(1) The function of main control
Operation Detail
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selected Selected SelectedSpeed Speed Speed
INDOOR FAN Low Low
- 11 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Heating Mode OperationThe unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
n Hot-start Control
• The indoor fan does no rotate until the evaporator piping temperature will be reached to 25°C(76°F).• The operation diagram is as following.
35°C(94°F)30°C(86°F)
27°C(80°F)25°C(76°F)
22°C(72°F)
Pipetemperature
OFFIndoor fan
speed
LOLOW
LOW SELECTEDFAN
LOW LOLOW
COMP ON
Operation Detail
Thermal OFF ON
OFF ON
ON
ONOutdoor fan
Indoor fan
4 Way ON
Room
Temperature
Thermal Off
Thermal On
Indoor pipeTemperature
33°C(92°F)
25°C(76°F)20°C(68°F)
36°C(96°F)
Minimum
3min
Settingfan
speed
Settingfan
speed
Settingfan
speedStop Low Stop StopLow LowLow Low
Thermal ON Thermal OFF
Indoor Unit mode ST+2 ST+4
2TH To be selected lower temperature To be selected lower temperature(Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. mode ST+0 ST+2
- 12 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TU
Cei
ling
Cas
sette
1-w
ay
AR
NU
07G
TU*2
AR
NU
09G
TU*2
AR
NU
12G
TU*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it siz
e(7k
, 9k,
12k
):ø6.
35
2
Gas
pip
e co
nnec
tion
Unit
size(
7k, 9
k, 1
2k):ø
12.7
3
Air
suct
ion
grill
4
Air
disc
harg
e gr
ill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
1,10
0500 34
881(
Air
outle
t Hol
e)
168.3
106.8206.6
275.8 96.557.4
453
2732
0.5
1012
8886
1
(Pan
el N
ame:
PT
-UU
C)
Dimensions
- 13 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TU
Cei
ling
Cas
sette
1-w
ay
AR
NU
07G
TU*2
AR
NU
09G
TU*2
AR
NU
12G
TU*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it siz
e(7k
, 9k,
12k
):ø6.
35
2
Gas
pip
e co
nnec
tion
Unit
size(
7k, 9
k, 1
2k):ø
12.7
3
Air
suct
ion
grill
4
Air
disc
harg
e gr
ill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
(Pan
el N
ame:
PT
-UU
D)
453
46.5
57.4
34
117
96.5168.3
106.8206.3275.8
109.
5
861
1012
88
1100
109.
5
453
320.
527
500
354.3
- 14 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TT
Cei
ling
Cas
sette
1-w
ay
AR
NU
18G
TT*2
AR
NU
24G
TT*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it size
(18k):
ø6.35
, (24k
):ø9.5
2
2
Gas
pip
e co
nnec
tion
Unit s
ize(18
k):ø1
2.7, (2
4k):ø
15.88
3
Air
suct
ion
grill
4
Air
disc
harg
e gr
ill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
20.665.3180.6
247.5453.8
57.491
96.1173.8
31.7
453.
8
1,42
0500 34
1,20
1(A
ir O
utle
t Hol
e)
65.1
1332
1176
.4
(Pan
el N
ame:
PT
-UT
C)
Dimensions
- 15 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TT
Cei
ling
Cas
sette
1-w
ay
AR
NU
18G
TT*2
AR
NU
24G
TT*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it size
(18k):
ø6.35
, (24k
):ø9.5
2
2
Gas
pip
e co
nnec
tion
Unit s
ize(18
k):ø1
2.7, (2
4k):ø
15.88
3
Air
suct
ion
grill
4
Air
disc
harg
e gr
ill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
(Pan
el N
ame:
PT-
UT
D)
109.
5
44
132
15.2
Ø14
57
34
50046.5
20.665.3
180.6247.5
453.8
31.757.4
173.897.191
109.
5
1420
453.
8
335
96.5
22.3
65.1
1176
.4
1332
- 16 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................17
2. Operation Details........................................................................18
3. Dimensions .................................................................................20
Ceiling Mounted Cassette Type (2Way)
- 17 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Airflow Direction Control
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pip-ing temperature will be reached at 25°C(76°F).
Compact and light design • To install a unit is very convenient because of smallersize than textile.
Low noise• The most advanced low-noise design.• The adoption of turbo fan and round type heat exchang-
er give the quietest operation.
Long life filter • Long life wrinkle(type) and washable and anti-bacteriafilter is adopted.
High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm
(27-9/16inch) is possible.
High-Ceiling corresponding Function • According to the height of ceiling, the RPM of indoor fanmotor is selected to increase air reaching distance.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• Jet, High, Med, Low, Lolow
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Functions
- 18 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Detail
n Auto Swing Control• This function is to swing the louver up and down automatically.
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
(1) The function of main control
Operation Detail
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selected Selected SelectedSpeed Speed Speed
INDOOR FAN Low Low
- 19 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Heating Mode OperationThe unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
n Hot-start Control
• The indoor fan does no rotate until the evaporator piping temperature will be reached to 25°C(76°F).• The operation diagram is as following.
35°C(94°F)30°C(86°F)
27°C(80°F)25°C(76°F)
22°C(72°F)
Pipetemperature
OFFIndoor fan
speed
LOLOW
LOW SELECTEDFAN
LOW LOLOW
COMP ON
Operation Detail
Thermal OFF ON
OFF ON
ON
ONOutdoor fan
Indoor fan
4 Way ON
Room
Temperature
Thermal Off
Thermal On
Indoor pipeTemperature
33°C(92°F)
25°C(76°F)20°C(68°F)
36°C(96°F)
Minimum
3min
Settingfan
speed
Settingfan
speed
Settingfan
speedStop Low Stop StopLow LowLow Low
Thermal ON Thermal OFF
Indoor Unit mode ST+2 ST+4
2TH To be selected lower temperature To be selected lower temperature(Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. mode ST+0 ST+2
- 20 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
830(
32-1
1/16
)A
B47
.9(1
-7/8
)
275(10-13/16)
550(21-11/16)
69.5(2-3/4)
889.
2(35
)
1050
(41-
5/16
)
640(25-3/16)
28.5
(1-1
/8)
4
2
1
3
TL
A B
225(
8-7/
8)
126.
5(5)
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: TL
Cei
ling
Cas
sette
2-w
ay
AR
NU
183T
L*2
AR
NU
243T
L*2
Nam
e
1Li
quid
pip
e co
nnec
tion
(18k
) ø6.
35(1
/4),
(24k
)ø9.
52(3
/8)
2G
as p
ipe
conn
ectio
n(1
8k) ø
12.7
(1/2
), (2
4k)ø
15.8
8(5/
8)
3A
ir su
ctio
n gr
ill
4A
ir di
scha
rge
grill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
[Uni
t : m
m(in
ch)]
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
- 21 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................22
2. Operation Details........................................................................23
3. Dimensions .................................................................................25
Ceiling Mounted Cassette Type (4Way) (1)
- 22 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Airflow Direction Control
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pip-ing temperature will be reached at 25°C(76°F).
Compact and light design • To install a unit is very convenient because of smallersize than textile.
Low noise• The most advanced low-noise design.• The adoption of turbo fan and round type heat exchang-
er give the quietest operation.
Long life filter • Long life wrinkle(type) and washable and anti-bacteriafilter is adopted.
High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm
(27-9/16inch) is possible.
High-Ceiling corresponding Function • According to the height of ceiling, the RPM of indoor fanmotor is selected to increase air reaching distance.
Central Control(Optional)
Swirl Swing Control
• It is operating individually or totally by central control function.
• It is operating swirl swing
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• Jet, High, Med, Low, Lolow
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Functions
- 23 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Detail
n Auto Swing Control• This function is to swing the louver up and down automatically.
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
n Swirl Swing ControlVane 2, 4 is almost vane closed while vane1, 3 is opened.
Vane 1, 3 and vane 2,4 turn over minutely
(1) The function of main control
Operation Detail
Vane 2
Vane 1 Vane 3
Vane 4
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selected Selected SelectedSpeed Speed Speed
INDOOR FAN Low Low
- 24 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Heating Mode OperationThe unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
n Hot-start Control
• The indoor fan does no rotate until the evaporator piping temperature will be reached to 25°C(76°F).• The operation diagram is as following.
35°C(94°F)30°C(86°F)
27°C(80°F)25°C(76°F)
22°C(72°F)
Pipetemperature
OFFIndoor fan
speed
LOLOW
LOW SELECTEDFAN
LOW LOLOW
COMP ON
Operation Detail
Thermal OFF ON
OFF ON
ON
ONOutdoor fan
Indoor fan
4 Way ON
Room
Temperature
Thermal Off
Thermal On
Indoor pipeTemperature
33°C(92°F)
25°C(76°F)20°C(68°F)
36°C(96°F)
Minimum
3min
Settingfan
speed
Settingfan
speed
Settingfan
speedStop Low Stop StopLow LowLow Low
Thermal ON Thermal OFF
Indoor Unit mode ST+2 ST+4
2TH To be selected lower temperature To be selected lower temperature(Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. mode ST+0 ST+2
- 25 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TR
Cei
ling
Cas
sette
4-w
ay
AR
NU
05G
TR*2
AR
NU
07G
TR*2
AR
NU
09G
TR*2
AR
NU
12G
TR*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it size
(5k, 7
k, 9k
, 12k
):ø6.3
5
2
Gas
pip
e co
nnec
tion
Unit s
ize(5k
, 7k,
9k, 1
2k):ø
12.7
3
Dra
in p
ipe
conn
ectio
n VP
25(Φ
32)
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e gr
ill
6
Air
suct
ion
grill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
570
570
517
69
128
517
B
AB
AR
RO
W V
IEW
A A
RR
OW
VIE
W
461
523
214
53
84.559.5
79 48
142.
530
19
57016
5
63
34.5
2
3
1
4
Bra
nch
Duc
t Con
nect
ion
R35
700
22.5
380(
Air
outle
t hol
e)
473
700
376(Inlet Grille)
4R20
5 6
CE
ILIN
G O
PE
NIN
G
500m
m o
r mor
e*
500m
m o
r mor
e*
• RE
QU
IRE
D S
PAC
E
500m
m o
r mor
e*
500m
m o
r mor
e*
- 26 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TQ
Cei
ling
Cas
sette
4-w
ay
AR
NU
15G
TQ*2
AR
NU
18G
TQ*2
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it siz
e(15
k, 1
8k):Ø
6.35
2
Gas
pip
e co
nnec
tion
Unit
size(
15k,
18k
):Ø12
.7
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e gr
ill
6
Air
suct
ion
grill
Num
ber
Des
crip
ition
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
(uni
t : m
m)
570
570
517
68
174
517
461
523
3019 14
2.5
165
63
95.5
79 48
12559.5
570
7694
256
2
4
3
1
Bra
nch
Duc
t Con
nect
ion
R35
700
22.5
380(
Air
outle
t hol
e)
473
700
376(Inlet Grille)
4R20
5 6
B A
RR
OW
VIE
WA
AR
RO
W V
IEW
B
A
VP25
(Φ32
)
CE
ILIN
G O
PE
NIN
G
500m
m o
r mor
e*
500m
m o
r mor
e*• R
EQ
UIR
ED
SPA
CE
500m
m o
r mor
e*
500m
m o
r mor
e*
- 27 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................28
2. Operation Details........................................................................29
3. Dimensions .................................................................................31
Ceiling Mounted Cassette Type (4Way) (2)
- 28 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Airflow Direction Control
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pip-ing temperature will be reached at 25°C(76°F).
Compact and light design • To install a unit is very convenient because of smallersize than textile.
Low noise• The most advanced low-noise design.• The adoption of turbo fan and round type heat exchang-
er give the quietest operation.
Long life filter • Long life wrinkle(type) and washable and anti-bacteriafilter is adopted.
High head Drain pump• Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm
(27-9/16inch) is possible.
High-Ceiling corresponding Function • According to the height of ceiling, the RPM of indoor fanmotor is selected to increase air reaching distance.
Central Control(Optional)
Swirl Swing Control
• It is operating individually or totally by central control function.
• It is operating swirl swing
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• Jet, High, Med, Low, Lolow
• Intermittent operation of fan at low speed.
• The louver can be set at swing up and down automatically.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Functions
- 29 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Detail
n Auto Swing Control• This function is to swing the louver up and down automatically.
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
(1) The function of main control
Operation Detail
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selected Selected SelectedSpeed Speed Speed
INDOOR FAN Low Low
- 30 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Heating Mode OperationThe unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
n Hot-start Control
• The indoor fan does no rotate until the evaporator piping temperature will be reached to 25°C(76°F).• The operation diagram is as following.
35°C(94°F)30°C(86°F)
27°C(80°F)25°C(76°F)
22°C(72°F)
Pipetemperature
OFFIndoor fan
speed
LOLOW
LOW SELECTEDFAN
LOW LOLOW
COMP ON
Operation Detail
Thermal OFF ON
OFF ON
ON
ONOutdoor fan
Indoor fan
4 Way ON
Room
Temperature
Thermal Off
Thermal On
Indoor pipeTemperature
33°C(92°F)
25°C(76°F)20°C(68°F)
36°C(96°F)
Minimum
3min
Settingfan
speed
Settingfan
speed
Settingfan
speedStop Low Stop StopLow LowLow Low
Thermal ON Thermal OFF
Indoor Unit mode ST+2 ST+4
2TH To be selected lower temperature To be selected lower temperature(Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. mode ST+0 ST+2
- 31 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TP
Cei
ling
Cas
sette
4-w
ay
AR
NU
21G
TP*2
AR
NU
24G
TP*2
AR
NU
28G
TP*2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
684840
671
787 78
7
840
Nam
e
1
Liqu
id p
ipe
conn
ectio
n U
nit s
ize(
24k,
28k
):ø9.
52
2
Gas
pip
e co
nnec
tion
Uni
t siz
e(24
k, 2
8k):ø
15.8
8
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e gr
ill
6
Air
suct
ion
grill
Num
ber
Des
crip
ition
(uni
t : m
m)
204
804
154
998260
840
60
350
165
8053
.510
8
204
40 65
4 3
1
2
Bran
ch D
uct C
onne
ctio
n
79 41.5
950 25614(Inlet Grille)
500(
Air
outle
t Hol
e)
4-R
20
737
950
5 6
475
420
420393
870-
920(
CEIL
ING
OPEN
ING
SPAC
E)
786(
SUSP
ENSI
ON P
OSIT
ION)
300OR LESS
682(SUSPENSION POSITION)
669(SUSPENSION POSITION)
870-920(CEILING OPENING SPACE)
Cei
ling
open
ing
B
A
OUTD
OOR
AIR
INTA
KE(D
IREC
T CO
NNEC
TION
)
BRAN
CH D
UCT
CONN
ECTI
ONBR
ANCH
DUC
TCO
NNEC
TION
13-ø
3, 3
Hole
13-ø
3, 3
Hole
ø70
71
350
165
79
505032
9292
9292
50
165
10
31
7126
62
35
B A
RR
OW
VIE
W
A A
RR
OW
VIE
W
VP25
(Φ32
) 500m
m o
r mor
e*
500m
m o
r mor
e*
• RE
QU
IRE
D S
PAC
E
500m
m o
r mor
e*
500m
m o
r mor
e*
- 32 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
840
246195
350
100 52
165
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TN
Cei
ling
Cas
sette
4-w
ay
AR
NU
36G
TN*2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1
Liqu
id p
ipe
conn
ectio
n U
nit s
ize(
36k)
:ø9.
52
2
Gas
pip
e co
nnec
tion
Uni
t siz
e(36
k):ø
15.8
8
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e gr
ill
6
Air
suct
ion
grill
Num
ber
Des
crip
ition
(uni
t : m
m)
4 3
1
2
Bran
ch D
uct C
onne
ctio
n
107
78103
141246
40
110
6084
080
53.5
95025614(Inlet Grille)
500(
Air
outle
t Hol
e)
4-R
20
737
950
5 6
475
420
420393
870-
920(
CEIL
ING
OPEN
ING
SPAC
E)
786(
SUSP
ENSI
ON P
OSIT
ION)
300OR LESS
682(SUSPENSION POSITION)
669(SUSPENSION POSITION)
870-920(CEILING OPENING SPACE)
Cei
ling
open
ing
B
A
OUTD
OOR
AIR
INTA
KE(D
IREC
T CO
NNEC
TION
)
BRAN
CH D
UCT
CONN
ECTI
ON
BRAN
CH D
UCT
CONN
ECTI
ON
13-ø
3, 3
Hole
13-ø
3, 3
Hole
ø70
100
606043
9292
9292
350
165
165
10
7144
80
71
3135
B A
RR
OW
VIE
W
A A
RR
OW
VIE
W
VP25
(Φ32
) 500m
m o
r mor
e*
500m
m o
r mor
e*
• RE
QU
IRE
D S
PAC
E
500m
m o
r mor
e*
500m
m o
r mor
e*
- 33 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: TM
Cei
ling
Cas
sette
4-w
ay
AR
NU
42G
TM*2
AR
NU
48G
TM*2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1
Liqu
id p
ipe
conn
ectio
n U
nit s
ize(
42k,
48k
):ø9.
52
2
Gas
pip
e co
nnec
tion
Uni
t siz
e(42
k, 4
8k):ø
15.8
8
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e gr
ill
6
Air
suct
ion
grill
Num
ber
Des
crip
ition
(uni
t : m
m)
4 3
1
2
840
288
237
Bran
ch D
uct C
onne
ctio
n
350
53.5
100 84
165
95025
614(Inlet Grille)
500(
Air
outle
t Hol
e)
4-R
20
737
950
5 6
OUTD
OOR
AIR
INTA
KE(D
IREC
T CO
NNEC
TION
)
13- ø
3, 3
Hole
ø70
7175
110
71
3135 B A
RR
OW
VIE
W
BRAN
CH D
UCT
CONN
ECTI
ON
BRAN
CH D
UCTC
ONNE
CTIO
N
13- ø
3, 3
Hole
60 60 76
136
9292
9292
350
165
165
10
100
A A
RR
OW
VIE
W
475
420
420393
870-
920(
CEIL
ING
OPEN
ING
SPAC
E)
786(
SUSP
ENSI
ON P
OSIT
ION)
300OR LESS
682(SUSPENSION POSITION)
669(SUSPENSION POSITION)
870-920(CEILING OPENING SPACE)
Cei
ling
open
ing
B
A
VP25
(Φ32
)
500m
m o
r mor
e*
500m
m o
r mor
e*
• RE
QU
IRE
D S
PAC
E
500m
m o
r mor
e*
500m
m o
r mor
e*
- 34 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................35
2. Operation Details........................................................................36
3. Dimensions .................................................................................43
Art Cool Type(Mirror)
- 35 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Functions
1. Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• High, Med, Low, CHAOS
• Intermittent operation of fan at low speed.
• The fan is switched to low(Cooling), med(Heating) speed.• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Soft Dry Operation Mode
• Both the indoor and outdoor fan stops dur-
ing defrosting.
• The indoor fan does not rotate until the evaporator pipe temperature will be reachedat 28°C(82°F).
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
Signal ReceptorReceives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)Operation Indication Lamps
On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.
- 36 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
DISPLAY1) High quality LCD remote controller suppliedOperation Indicator
• On while in appliance operation, off while in appliance pause
Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled
Defrost Indicator• Off except when hot start during heating mode operation or while in defrost control.
Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.
Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.
Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.
Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.
n Cooling Mode Operation• When the intake air temperature reaches 0.5°C(33°F) below the setting temp, the compressor and the outdoor
fan stop.
• When it reaches 0.5°C(33°F) above the setting temp, they start to operate again.
Compressor ON Temp=> Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp-0.5°C(33°F)
• While in compressor running, operating with the airflow speed set by the remote controller. While in compres-sor not running, operating with the low airflow speed regardless of the setting.
n Healthy Dehumidification Mode• When the dehumidification operation input by the remote controller is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C(34°F)
18°C(64°F) ≤ Intake Air Temp < 24°C(76°F) => Intake Air Temp-0.5°C(33°F)
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidificationoperation and 4-min compressor off repeat
Compressor ON Temp. => Setting Temp+0.5°C(33°F)
Compressor OFF Temp. => Setting Temp-0.5°C(33°F)
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
n Heating Mode Operation
Function of Controls
- 37 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
• When the intake air Temp. reaches Compressor OFF Temp., the compressor is turned off.When the intake air Temp. reaches Compressor ON Temp., the compressor is turned on.
Themo ON Temp. => Setting Temp. +2˚C(36°F)
Themo OFF Temp. => Setting Temp.+4°C(39°F)
• While in compressor on, when above 38°C(100°F), it operates with setting airflow speed (while in sleep mode,with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C (92°F), when above35°C(94°F) , it operates with the low airflow speed.
• While in defrost control, both of the indoor and outdoor fans are turned off.
n Defrost Control• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to
defrost of the outdoor unit.
n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the
setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the compres-sor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp<18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-ature
n Fuzzy Operation (Outdoor unit H/P Model)• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling
21°C(70°F)≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C(70°F) => Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
- 38 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
1) Fuzzy Operation for Cooling• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more
below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.Compressor ON Temp. => Setting Temp+0.5°C(33°F)
Compressor OFF Temp. => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp<18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more
below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.Compressor ON Temp. => Setting Temp+0.5°C(33°F)
Compressor OFF Temp. => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F)=> Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as indehumidification operation.
- 39 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
3) Fuzzy Operation for Heating• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37°F) or more
above the setting temp, the compressor is turned off. When below the setting temp, the compressor isturned on.
Compressor ON Temp => Setting Temp + 2°C(36°F)Compressor OFF Temp => Setting Temp + 4°C(39°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according tothe intake air temperature and the setting temperature.
n Airflow Speed Selection• The airflow speed of the indoor fan is set to high, medium, low, or chaos by the input of the airflow speed
selection key on the remote controller.
n On-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
n Off-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
- 40 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation
is carried out according to the set time.
n Sleep Timer Operation• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in
appliance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°) again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set tothe low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set tothe medium.
n Chaos Swing Mode• By the Chaos Swing key input, the vane automatically operates with the Chaos Swing or they are fixed to the
desired direction.
n Chaos Natural Wind Mode• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-
flow mode is operated for 2~15 sec randomly by the Chaos Simulation.”
n Jet Cool Mode Operation (Outdoor unit C/O Model)• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F).
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and thenoperated in order that the air outflow could reach further.
n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the
other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F).
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and thenoperated in order that the air outflow could reach further.
n Auto Restarting Operation• When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• Operation Mode that is kept on the memory
- 41 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
n Forced Operation (Outdoor unit C/O Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation button is on
the main unit of the appliance to operate the appliance in the standard conditions.
• Press the forced operation button, the forced operation is carried out.
• Press the forced operation button once again to stop operation.
• The forced operation is carried out in cooling mode with the setting temperature 22°C(72°F) and the highspeed of airflow.
n Forced Operation (Outdoor unit H/P Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation selection
switch is on the main unit of the appliance to operate the appliance in the standard conditions.
• Press the forced operation button, the forced operation is carried out.
• Press the forced operation button once again to stop operation.
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operationcondition is set according to the intake air temperature as follows.
24°C(76°F) ≤ Intake Air Temp => Cooling Mode Operation, 22°C(72°F), High Speed
21°C(70°F) ≤ Intake Air Temp < 24°C(76°F) => Dehumidification Operation, 23°C(74°F), High Speed
Intake Air Temp < 21°C(70°F) => Heating Mode Operation, 24°C(76°F), High Speed
n Test Operation Control• To check the condition of the installation when installing the appliance, the appliance is operated at cooling
mode, high speed of airflow, compressor-on for 18 min without controlling the room temperature.
• After supplying power to the main body, keep pressing the forced operation button for about 3 seconds.
• While in test operation, a key can be input by the remote controller. When a key (operation start/stop, operation mode selection, airflow speed selection, temperature control, JetCool) is input by the remote controller, the test operation is canceled and the appliance is operated accordingto the setting by the remote controller.
n Protection of the evaporator pipe from frosting• In the temperrature of the indoor pipe is below 0°C(32°F) after 7 minutes from starting the compressor, the
compressor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the tem-perature of the indoor pipe is over 7°C(45°F), the compressor and the outdoor fan are reoperated.
• Outdoor fan motor stops when indoor pipe temperature is blow 3°C(37°F) and restarts at the pipe temperatureabove 6°C(43°F) or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motorruns continuously at even below 3°C(37°F).
- 42 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Buzzer Sounding Operation• When the appliance-operation key is input by the remote controller, the short “beep-beep-” sounds.
• When the appliance-pause key is input by the remote controller, the long “beep—” sounds.
n Air Cleaner Operation• When an air cleaner function is selected during Air Conditioner operation
- Plasma air cleaner function will be operated while in any operation mode with selecting the function.- The function is to be stopped while it is operating with selecting the function.
• When an air cleaner function is selected during operation off- The function will be only operated.
• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to bestopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)will be operated again.
- 43 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: SE
AR
T C
OO
L M
irror
AR
NU
073S
E*2
AR
NU
093S
E*2
AR
NU
123S
E*2
AR
NU
153S
E*2
WM
odel
AR
NU
073S
E*2
AR
NU
093S
E*2
AR
NU
123S
E*2
AR
NU
153S
E*2
HD
915
(36)
282
(11-
1/8)
169
(5-5
/8)
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
[Uni
t : m
m(in
ch)]
[Uni
t : m
m(in
ch)]
915(
36)
282(11-1/8)
282(11-1/8)
169(
5-5/
8)
567(
22-3
/8)
51(2
-1/1
6)
53(2-1/16)
165(6-1/2)
H
W
D
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
1
2
Nam
e
1
Air
disc
harg
e gr
ill
2
Air
suct
ion
grill
Num
ber
Des
crip
ition
265(10-1/2)
- 44 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
Dis
play
& s
igna
l rec
eive
r
Par
t Nam
e
Fro
nt p
anel
Air
suct
ion
grill
e
Inst
alla
tion
plat
e
Kno
ckou
t hol
e
5
N
o. 2 431
Rem
ark
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
3 1
2
4
299
48
93281
122
200
1107
804
10
63
53
5872
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: S8
AR
T C
OO
L M
irror
ARN
U18
GS8
*2AR
NU
24G
S8*2
(uni
t : m
m)
- 45 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................46
2. Operation Details........................................................................47
3. Dimensions .................................................................................54
ArtCoolGallery
- 46 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Functions
1. Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• High, Med, Low, CHAOS
• Intermittent operation of fan at low speed.
• The fan is switched to low(Cooling), med(Heating) speed.• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Soft Dry Operation Mode
• Both the indoor and outdoor fan stops dur-
ing defrosting.
• The indoor fan does not rotate until the evaporator pipe temperature will be reachedat 28°C(82°F).
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
Signal ReceptorReceives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)Operation Indication Lamps
On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.
- 47 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
DISPLAY1) High quality LCD remote controller suppliedOperation Indicator
• On while in appliance operation, off while in appliance pause
Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled
Defrost Indicator• Off except when hot start during heating mode operation or while in defrost control.
Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.
Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.
Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.
Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.
n Cooling Mode Operation• When the intake air temperature reaches 0.5°C(33°F) below the setting temp, the compressor and the outdoor
fan stop.
• When it reaches 0.5°C(33°F) above the setting temp, they start to operate again.
Compressor ON Temp=> Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp-0.5°C(33°F)
• While in compressor running, operating with the airflow speed set by the remote controller. While in compres-sor not running, operating with the low airflow speed regardless of the setting.
Function of Controls
- 48 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Healthy Dehumidification Mode• When the dehumidification operation input by the remote controller is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C(78°F) ≤ Intake Air Temp => 25°C
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C
18°C(64°F) ≤ Intake Air Temp < 24°C(76°F) => Intake Air Temp-0.5°C(33°F)
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidificationoperation and 4-min compressor off repeat
Compressor ON Temp. => Setting Temp+0.5°C(33°F)
Compressor OFF Temp. => Setting Temp-0.5°C(33°F)
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
n Heating Mode Operation• When the intake air Temp. reaches Compressor OFF Temp., the compressor is turned off.
When the intake air Temp. reaches Compressor ON Temp., the compressor is turned on.
Themo ON Temp. => Setting Temp. +2˚C(36°F)
Themo OFF Temp. => Setting Temp.+4°C(39°F)
• While in compressor on, when above 38°C(100°F), it operates with setting airflow speed (while in sleep mode,with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(92°F) , when above35°C(94°F) , it operates with the low airflow speed.
• While in defrost control, both of the indoor and outdoor fans are turned off.
n Defrost Control• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to
defrost of the outdoor unit.
n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the
setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the compres-sor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp<18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-
- 49 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
ature
n Fuzzy Operation (Outdoor unit H/P Model)• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.
24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling
21°C(70°F) ≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C(70°F) => Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more
below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the com-pressor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
- 50 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp < 18°C (64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as indehumidification operation.
3) Fuzzy Operation for Heating• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37°F) or more
above the setting temp, the compressor is turned off. When below the setting temp, the compressor isturned on.
Compressor ON Temp => Setting Temp + 2°C(36°F)Compressor OFF Temp => Setting Temp + 4°C(39°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according tothe intake air temperature and the setting temperature.
n Airflow Speed Selection• The airflow speed of the indoor fan is set to high, medium, low, or chaos by the input of the airflow speed
selection key on the remote controller.
n On-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
n Off-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
- 51 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation
is carried out according to the set time.
n Sleep Timer Operation• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in
appliance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°F) again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set tothe low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set tothe medium.
n Chaos Swing Mode• By the Chaos Swing key input, the vane automatically operates with the Chaos Swing or they are fixed to the
desired direction.
n Chaos Natural Wind Mode• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-
flow mode is operated for 2~15 sec randomly by the Chaos Simulation.”
n Jet Cool Mode Operation (Outdoor unit C/O Model)• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F)
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and thenoperated in order that the air outflow could reach further.
n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the
other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F)
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and thenoperated in order that the air outflow could reach further.
n Auto Restarting Operation• When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• Operation Mode that is kept on the memory
- 52 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
n Forced Operation (Outdoor unit C/O Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation button is on
the main unit of the appliance to operate the appliance in the standard conditions.
• Press the forced operation button, the forced operation is carried out.
• Press the forced operation button once again to stop operation.
• The forced operation is carried out in cooling mode with the setting temperature 22°C(72°F) and the highspeed of airflow.
n Forced Operation (Outdoor unit H/P Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation selection
switch is on the main unit of the appliance to operate the appliance in the standard conditions.
• Press the forced operation button, the forced operation is carried out.
• Press the forced operation button once again to stop operation.
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operationcondition is set according to the intake air temperature as follows.
24°C(76°F) ≤ Intake Air Temp => Cooling Mode Operation, 22°C(72°F), High Speed
21°C(70°F) ≤ Intake Air Temp < 24°C(76°F) => Dehumidification Operation, 23°C(74°F), High Speed
Intake Air Temp < 21°C(70°F) => Heating Mode Operation, 24°C(76°F), High Speed
n Test Operation Control• To check the condition of the installation when installing the appliance, the appliance is operated at cooling
mode, high speed of airflow, compressor-on for 18 min without controlling the room temperature.
• After supplying power to the main body, keep pressing the forced operation button for about 3 seconds.
• While in test operation, a key can be input by the remote controller. When a key (operation start/stop, operation mode selection, airflow speed selection, temperature control, JetCool) is input by the remote controller, the test operation is canceled and the appliance is operated accordingto the setting by the remote controller.
n Protection of the evaporator pipe from frosting• In the temperrature of the indoor pipe is below 0°C(32°F) after 7 minutes from starting the compressor, the
compressor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the tem-perature of the indoor pipe is over 7°C(45°F), the compressor and the outdoor fan are reoperated.
• Outdoor fan motor stops when indoor pipe temperature is blow 3°C(37°F) and restarts at the pipe temperatureabove 6°C or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motor runs con-tinuously at even below 3°C(37°F).
- 53 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Buzzer Sounding Operation• When the appliance-operation key is input by the remote controller, the short “beep-beep-” sounds.
• When the appliance-pause key is input by the remote controller, the long “beep—” sounds.
n Air Cleaner Operation• When an air cleaner function is selected during Air Conditioner operation
- Plasma air cleaner function will be operated while in any operation mode with selecting the function.- The function is to be stopped while it is operating with selecting the function.
• When an air cleaner function is selected during operation off- The function will be only operated.
• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to bestopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)will be operated again.
- 54 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: SF
AR
T C
OO
L G
alle
ry
AR
NU
073S
F*2
AR
NU
093S
F*2
AR
NU
123S
F*2
WM
odel
AR
NU
073S
F*2
AR
NU
093S
F*2
AR
NU
123S
F*2
HD
600
(23-
5/8)
600
(23-
5/8)
146
(5-1
1/16
)
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
[Uni
t : m
m(in
ch)]
[Uni
t : m
m(in
ch)]
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
Nam
e
1
Air
disc
harg
e gr
ill
2
Air
suct
ion
grill
Num
ber
Des
crip
ition
Pip
e H
ole
Fix
Hol
e
Han
ger
Hol
e
H
WD
1
2
1
1
500(
19-5
/8)
525(20-5/8)
- 55 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Funtions ......................................................................................56
2. Operation Details........................................................................57
3. Dimensions .................................................................................60
Ceiling Concealed Duct Type (Low static)
- 56 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. FuntionsIndoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating)• The indoor fan does not rotate until the evaporator piping
temperature reaches 25°C(76°F).
High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Functions
- 57 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
(1) The function of main control
Operation Details
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
- 58 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3°C(37°F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40°C(104°F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 59 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).
• The operation diagram is as following.
Operation Details
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
- 60 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: B1/
B2
Cei
ling
Con
ceal
ed D
uct (
Low
Sta
tic)
AR
NU
073B
1G2
AR
NU
093B
1G2
AR
NU
123B
1G2
AR
NU
153B
1G2
AR
NU
183B
2G2
AR
NU
243B
2G2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1Li
quid
pip
e co
nnec
tion
2G
as p
ipe
conn
ectio
n
3D
rain
pip
e co
nnec
tion
4Po
wer
sup
ply
conn
ectio
n
5A
ir di
scha
rge
6A
ir su
ctio
n
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
Unit
size(
7k,9
k,12
k,18
k):ø
6.35
(1/4
)Un
it siz
e(24
k):ø
9.52
(3/8
)Un
it siz
e(7k
,9k,
12k,
18k)
:ø12
.7(1
/2)
Unit
size(
24k)
:ø15
.88(
5/8)
A
383(15-1/16)
575(22-5/8)
161(6-5/16) 14(1/2)
154(6)
190(7-7/16)
18(3/4)
18(3
/4)
B
C
13(1
/2)
D
820
(32-
5/16
)
AB
CD
AR
NU
073B
1G2
AR
NU
093B
1G2
AR
NU
123B
1G2
AR
NU
153B
1G2
AR
NU
183B
2G2
AR
NU
243B
2G2
728
(28-
11/1
6)85
6(3
3-11
/16)
794
(31-
5/16
)
1100
(43-
5/16
)10
08(3
9-11
/16)
1131
(44-
9/16
)10
72(4
2-3/
16)
[Uni
t : m
m(in
ch)]
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
21
190(
7-7/
16)
65(2-1
/2)60(
2-3/8)
277(10-7/8)
216(8-1/2) 24(11/12)
1
3 4
2
5
6
- 61 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Funtions ......................................................................................62
2. Operation Details........................................................................63
3. Dimensions .................................................................................66
Ceiling Concealed Duct Type (Built in)
- 62 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. FuntionsIndoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating)• The indoor fan does not rotate until the evaporator piping
temperature reaches 25°C(76°F).
High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Functions
- 63 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
(1) The function of main control
Operation Details
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
- 64 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3°C(37°F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40°C(104°F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 65 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).
• The operation diagram is as following.
Operation Details
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
- 66 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: B3/
B4
Cei
ling
Con
ceal
ed D
uct (
Bui
lt in
)
ARNU
073B
3G2+
PBSG
B30(A
cces
sory)
, PBS
C30(A
cces
sory)
ARNU
093B
3G2+
PBSG
B30(A
cces
sory)
, PBS
C30(A
cces
sory)
ARNU
123B
3G2+
PBSG
B30(A
cces
sory)
, PBS
C30(A
cces
sory)
ARNU
153B
3G2+
PBSG
B30(A
cces
sory)
, PBS
C30(A
cces
sory)
ARNU
183B
4G2+
PBSG
B40(A
cces
sory)
, PBS
C40(A
cces
sory)
ARNU
243B
4G2+
PBSG
B40(A
cces
sory)
, PBS
C40(A
cces
sory)
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Wit
h S
uct
ion
Gri
lle
Wit
h S
uct
ion
Gri
lle &
Su
ctio
n C
anva
s
A_1
A_2
C_2
B_2
A_3
B_3
C_3
Btu
/hA
_17,
9,12
k82
0(32
-5/1
6)18
,24k
1100
(43-
5/16
)
A_2
B_2
C_2
PB
SG
B30
910(
35-1
3/16
)35
9(14
-1/8
)56
(2-3
/16)
PB
SG
B40
1188
(46-
13/1
6)35
9(14
-1/8
)56
(2-3
/16)
250(9-13/16)
190(7-7/16)
618(24-5/16)
388(15-1/4)
190(7-7/16)
500(19-11/16)(Max)575(22-5/8)
388(15-1/4)
A_3
B_3
C_3
PB
SC
3082
1(32
-5/1
6)27
4(10
-11/
16)
42~2
50(1
-9/1
6~9-
13/1
6) P
BS
C40
1100
(43-
5/16
)27
4(10
-11/
16)
42~2
50(1
-9/1
6~9-
13/1
6)
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
190(
7-7/
16)
65(2-1
/2)60(
2-3/8)
277(10-7/8)
216(8-1/2) 24(11/12)
Nam
e
1Li
quid
pip
e co
nnec
tion
2G
as p
ipe
conn
ectio
n
3D
rain
pip
e co
nnec
tion
4Po
wer
sup
ply
conn
ectio
n
5A
ir di
scha
rge
6A
ir su
ctio
n
Num
ber
Des
crip
ition
Unit
size(
7k,9
k,12
k,18
k):ø
6.35
(1/4
)Un
it siz
e(24
k):ø
9.52
(3/8
)Un
it siz
e(7k
,9k,
12k,
18k)
:ø12
.7(1
/2)
Unit
size(
24k)
:ø15
.88(
5/8)
6
5
4
1 3
2
[Uni
t : m
m(in
ch)]
B3/
B4
Wit
h S
uct
ion
Gri
lle&
Su
ctio
n C
anva
s W
ith
Su
ctio
n G
rille
- 67 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Funtions ......................................................................................68
2. Operation Details........................................................................69
3. Dimensions .................................................................................72
Ceiling Concealed Duct Type (High Static)
- 68 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Funtion
1. FuntionsIndoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating)• The indoor fan does not rotate until the evaporator piping
temperature reaches 25°C(76°F)
High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
- 69 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
(1) The function of main control
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
- 70 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3°C(37°F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40°C(104°F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 71 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).
• The operation diagram is as following.
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
- 72 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,LG
Ele
ctro
nics
US
A, H
VA
C D
ivis
ion
1000
Syl
van
Ave
nue,
Eng
lew
ood
Clif
fs, N
J 07
632
ww
w.lg
usa.
com
/ w
ww
.lghv
ac.c
om64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: BH
Cei
ling
Con
ceal
ed D
uct (
Hig
h S
tatic
)
AR
NU
073B
HA
2A
RN
U09
3BH
A2
AR
NU
123B
HA
2A
RN
U15
3BH
A2
AR
NU
183B
HA
2A
RN
U24
3BH
A2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1
Liqu
id p
ipe
conn
ectio
n
2
Gas
pip
e co
nnec
tion
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e
6
Air
suct
ion
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
Unit
size(
7k,9
k,12
k,18
k):ø
6.35
(1/4
)Un
it siz
e(24
k):ø
9.52
(3/8
)Un
it siz
e(7k
,9k,
12k,
18k)
:ø12
.7(1
/2)
Unit
size(
24k)
:ø15
.88(
5/8)
48(1-7/8)52(2-1/16)
165(6-7/13)
123(4-13/16)
140(5-9/16)
101(
3-15
/16) 31
(1-3
/13)
51(2
-1/1
6)
29(1
-1/8
)
70(2
-3/4
)
100(3-15/16)
260(
10-1
/4)
87(3
-7/1
6)
750(
29-1
/2)
30(1
-3/1
6)47
(1-7
/8)
450(17-11/16)
50(1-15/16)
355(14)
932(
36-1
1/16
)
133(5-1/4)
355(14)
450(17-11/16)
450(17-11/16)
260(10-1/4)
158(6-1/4)
75(2-15/16)
47(1
-7/8
)49(1
5/16
)
24(1
5/16
)
21(7
/8)
882(
34-3
/4)
65(2
-9/1
6)
108(
4-3/
13)
64(2
-1/2
)24
3(9-
9/16
)21
2(8-
3/8)
243(
9-9/
16)
119(
4-11
/16)
106(4-1/8)
127(5)
115(
4-1/
2)74
5(29
-3/8
)
20(3/4) 175(6-7/8)
3
2
5
1
4
6
114(
4-1/
2)
224(8-7/8)
60(2-3
/8)
R37.5
882(
34-3
/4)
- 73 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: BG
Cei
ling
Con
ceal
ed D
uct (
Hig
h S
tatic
)
AR
NU
283B
GA
2 A
RN
U36
3BG
A2
AR
NU
423B
GA
2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
261(
10-1
/4)
32(1
-3/1
3)51
(2-1
/16)
102(
4)
830(
32-1
1/16
)
29(1
-3/8
)75
(2-1
5/16
)
87(3-7/16)
1,23
0(48
-7/1
6)
1,18
2(46
-1/2
)
23(1
5/16
)
49(1
5/16
)
1,18
2(46
-5/8
)
158(6-1/4) 113(4-7/16)
298(11-11/16)
186(7-5/16)
232(
1-1/
4)24
3(9-
9/16
)24
3(9-
9/16
)23
2(1-
1/4)
232(
1-1/
4)
165(6-7/13)
53(2-1/16)47(1-7/8)
140(5-9/16)
122(4-13/16)
100(3-15/16)
87(3
-7/1
6)
450(17-11/16)
450(17-11/16)
50(1-15/16)
355(14)
108(
4-3/
13)
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
115(
4-1/
2)1,
043(
41)
20(3/4) 220(8-5/8)
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it size
(28k
,36k
,42k
):ø9.
52(3
/8)
2
Gas
pip
e co
nnec
tion
Unit s
ize(2
8k,3
6k,4
2k):ø
15.8
8(5/
8)
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e
6
Air
suct
ion
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
32
5
1
4
6
152(
5-7/
8)
224(8-7/8)
60(2-3
/8)
ø100
- 74 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: BR
Cei
ling
Con
ceal
ed D
uct (
Hig
h S
tatic
)
AR
NU
483B
RA
2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it siz
e(48
k):ø
9.52
(3/8
)
2
Gas
pip
e co
nnec
tion
Unit
size(
48k)
:ø15
.88(
5/8)
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e
6
Air
suct
ion
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
221(8-3/4)123(4-13/16)
72(2-13/16)26(1
)83
(3-1
/4)
101(
3-15
/16)
90(3-9/16)
135(5-
5/16)
122(4-13/16)
144(5-11/16)
260(
10-1
/4)
190(7
-7/16
)
115(
4-9/
16)
1,28
4(50
-9/1
6)
1,23
0(48
-7/1
6)
477(18-3/4) 56(2-3/16)
590(23-3/16)
590(23-3/16)
118(
4-5/
8)
1,00
4(39
-9/1
6)
114(
4-7/
16)
1,23
0(48
-7/1
6)
50(1
-15/
16)
32(1-3/13)
168(6-5/8)
185(7-1/4)
241(
9-1/
2)24
1(9-
1/2)
279(
11)
279(
11)
380(15)
140(5-9/16)
215(
8-1/
2)
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
120(
4-3/
4)1,
092(
43)
25(1) 303(12)
3
2
1
5
6
4
198(
7-3/
4)
312(12-1/4)
60(2-3
/8)
R60
- 75 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: B8
Cei
ling
Con
ceal
ed D
uct (
Hig
h S
tatic
)
UR
NU
763B
8A2
UR
NU
963B
8A2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
1
Liqu
id p
ipe
conn
ectio
n
2
Gas
pip
e co
nnec
tion
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e
6
Air
suct
ion
Des
crip
ition
[Uni
t : m
m(in
ch)]
Unit
size(
76k,
96k)
:ø9.
52(3
/8)
Unit
size(
76k)
:ø19
.05(
3/4)
Unit
size(
96k)
:ø22
.2(7
/8)
1,562
(61-7/
13)
1,622
(63-11
/13)
688(27)
688(27)
560(22) 64(2-7/13)
30(1-3/16)
1,22
0(48)
329(1
2-15/1
6)32
0(12
-5/8
)32
9(12-1
5/16)
318(12-7/13)
293(1
1-7/13
)
460(18-1/13)
460(
18-1
/13)
290(11-7/16) 161(6-3/8)
70(2
-3/4
)
120(
4-3/
4)
99(3
-7/8
)140
(5-9
/16)
440(17-3/8)20(3/4)
1,396
(54-15
/16)
115(4
-9/16
)
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
3
2
1
4
6
5
1,56
2(61
-1/2
)
64(2-1/2)70(2-3/4)
60(2-3/8)
122(4-7/8)
358(
14)
109(4-1
/4) 68(2-5/8
)
18(3/4)
58(2-1
/4)
Nam
eN
umbe
r
- 76 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Functions ....................................................................................77
2. Operation Details........................................................................78
3. Dimensions .................................................................................85
Wall Mountedd Type
- 77 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Functions
1. Functions
• Room temperature sensor. (THERMISTOR)
• Maintains the room temperature in accordance with the Setting temperature
• Indoor fan is delayed for 5 sec at the starting.
• High, Med, Low, CHAOS
• Intermittent operation of fan at low speed.
• The fan is switched to low(Cooling), med(Heating) speed.• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Signal ReceptorReceives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)Operation Indication Lamps
On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.Temperature : Indicate the setting temperature.
Soft Dry Operation Mode
• Both the indoor and outdoor fan stops dur-
ing defrosting.
• The indoor fan does not rotate until the evaporator pipe temperature will be reachedat 28°C(82°F).
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
- 78 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
DISPLAY(1) High quality LCD remote controller supplied
Operation Indicator• On while in appliance operation, off while in appliance pause
Timer(on/off) and Sleep timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled
Defrost Indicator• Off except when hot start during heating mode operation or while in defrost control.
Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.
Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.
Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.
n Cooling Mode Operation• When the intake air temperature reaches 0.5°C(33°F) below the setting temp, the compressor and the outdoor
fan stop.
• When it reaches 0.5°C(33°F) above the setting temp, they start to operate again.
Compressor ON Temp=> Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp-0.5°C(33°F)
• While in compressor running, operating with the airflow speed set by the remote controller. While in com-pressor not running, operating with the low airflow speed regardless of the setting.
Function of Controls
- 79 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Healthy Dehumidification Mode• When the dehumidification operation input by the remote controller is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C(34°F)
18°C(64°F) ≤ Intake Air Temp < 24°C(76°F) => Intake Air Temp-0.5°C(33°F)
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidificationoperation and 4-min compressor off repeat
Compressor ON Temp. => Setting Temp+0.5°C(33°F)
Compressor OFF Temp. => Setting Temp-0.5°C(33°F)
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
n Heating Mode Operation• When the intake air temp reaches +3°Cabove the setting temp, the compressor is turned off. When below the
setting temp, the compressor is turned on.
Thermo ON Temp. => Setting Temp. +2°C(36°F)
Thermo OFF Temp. => Setting Temp. +4°C(39°F)
• While in compressor on, when above 38°C(100°F) , it operates with or setting airflow speed (while in sleepmode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(92°F) , when above35°C(94°F) , it operates with the low airflow speed.
• While in defrost control, both of the indoor and outdoor fans are turned off.
n Defrost Control• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to
defrost the outdoor unit.
n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the set-
ting temp, the compressor is turned off. When 0.5°C (33°F) or more above the setting temp, the compressor isturned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
- 80 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp<18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-ature
n Fuzzy Operation (Outdoor unit H/P Model)• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.
24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling
21°C(70°F) ≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C(70°F) => Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more
below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F)=> Intake Air Temp
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more
below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
- 81 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp < 18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as indehumidification operation.
3) Fuzzy Operation for Heating• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37°F) or more
above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turnedon.
Compressor ON Temp => Setting Temp. +2°C(36°F)Compressor OFF Temp => Setting Temp. +4°C(39°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to theintake air temperature and the setting temperature.
n Airflow Speed Selection• The airflow speed of the indoor fan is set to high, medium, low, or chaos by the input of the airflow speed
selection key on the remote controller.
n On-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
n Off-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
- 82 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is
carried out according to the set time.
n Sleep Timer Operation• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in
appliance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°F) again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set tothe low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set tothe medium.
n Chaos Swing Mode• By the Chaos Swing key input, the vane automatically operates with the Chaos Swing or they are fixed to the
desired direction.
n Chaos Natural Wind Mode• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-
flow mode is operated for 2~15 sec randomly by the Chaos Simulation.”
n Jet Cool Mode Operation (Outdoor unit C/O Model)• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F)
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed atextremely high speed for 30 minutes setting the room temp. automatically to 18°C.
n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other
mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F)
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed atextremely high speed for 60 minutes setting the room temp. automatically to 30°C(86°F).
n Auto Restarting Operation• When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• Operation Mode that is kept on the memory
- State of Operation ON/OFF
- 83 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
n Forced Operation • Operation procedures when the remote control can't be used.• The operation will be started if the power button is pressed.• If you want to stop operation, re-press the button.
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times toindicate the forced operation.
n Test operation• During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-
perature and resets in 18±1 minutes.• During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, Press and hold ON/OFF button 3~5 seconds, then the buzzer sound 1 "beep".• If you want to stop the operation, re-press the button.
n Protection of the evaporator pipe from frosting• If the indoor pipe temp is below 0°C(32F) in 7 min. after the compressor operates without any pause while in
cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoorevaporator pipe from frosting.
• When the indoor pipe temp is 7°C(45°F) or higher after 3 min. pause of the compressor, the compressor andthe outdoor fan is turned on according to the condition of the room temperature.
n Buzzer Sounding Operation• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.• When the appliance-pause key is input by the remote control, the long "beep—" sounds.• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the
forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that theremote control signal cannot be received.
Heat pump ModelCooling Model
Room Temp. ≥ 24°C(76°F) 21°C(70°F) ≤ Room Temp. < 24°C(76°F) Room Temp. < 21°C(70°F)
Operating mode Cooling Cooling Healthy Dehumidification Heating
Indoor Fan Speed High High High High
Setting Temperature 22°C(72°F) 22°CC(72°F) 23°C(74°F) 24°C(76°F)
- 84 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Air Cleaner Operation• When an air cleaner function is selected during Air Conditioner operation
- Plasma air cleaner function will be operated while in any operation mode with selecting the function.- The function is to be stopped while it is operating with selecting the function.
• When an air cleaner function is selected during operation off- The function will be only operated.
• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to bestopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)will be operated again.
- 85 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
Low
er th
an 2
.3m
M
ore
than
200
mm
Hig
her t
han
eye-
leve
l
Mor
e th
an 1
00 m
m
Mor
e th
an 1
00 m
m
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: SE
PIP
E A
ND
DR
AIN
DIM
EN
SIO
N
PIP
ING
/WIR
ING
DIR
EC
TIO
NP
IPIN
G/W
IRIN
G
DIR
EC
TIO
N
Wal
l Mou
nted
AR
NU
07G
SE
*2A
RN
U09
GS
E*2
AR
NU
12G
SE
*2A
RN
U15
GS
E*2
WM
odel
AR
NU
07G
SE
*2A
RN
U09
GS
E*2
AR
NU
12G
SE
*2A
RN
U15
GS
E*2
HD
895
282
165
Not
e1.
Uni
t sho
uld
be in
stal
led
in c
ompl
ianc
e w
ith th
e in
stal
latio
n m
anua
l
in th
e pr
oduc
t box
.2.
Uni
t sha
ll be
gro
unde
d in
acc
orda
nce
with
the
loca
l reg
ulat
ions
or
a
pplic
able
nat
iona
l cod
es.
(uni
t : m
m)
567
265
Nam
e
1 2 3 4 5 6 7 8
Fron
t pan
elA
ir di
scha
rge
Air
suct
ion
Liqu
id p
ipe
Gas
pip
eD
rain
pip
eRi
ght s
ide
pipi
ng/w
iring
con
nect
ion
Left
side
pipi
ng/w
iring
con
nect
ion
Ø6.
35 F
lare
con
nect
ion
Ø12
.7 F
lare
con
nect
ion
Exte
rnal
dia
. Ø17
Num
ber
※ R
equi
red
spac
e(un
it:m
m)
Des
crip
ition
(uni
t : m
m)
PIP
ING
DIR
EC
TIO
N
- 86 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: S5
Wal
l Mou
nted
AR
NU
18G
S5*
2A
RN
U24
GS
5*2
WM
odel
AR
NU
18G
S5*
2A
RN
U24
GS
5*2
HD
1090
300
178
Not
e1.
Uni
t sho
uld
be in
stal
led
in c
ompl
ianc
e w
ith th
e in
stal
latio
n m
anua
l
in th
e pr
oduc
t box
.2.
Uni
t sha
ll be
gro
unde
d in
acc
orda
nce
with
the
loca
l reg
ulat
ions
or
a
pplic
able
nat
iona
l cod
es.
(uni
t : m
m)
281
804
Fron
t pan
elA
ir di
scha
rge
Air
suct
ion
Liqu
id p
ipe
Gas
pip
eD
rain
pip
eRi
ght s
ide
pipi
ng/w
iring
con
nect
ion
Left
side
pipi
ng/w
iring
con
nect
ion
Ø6.
35 F
lare
con
nect
ion
Ø12
.7 F
lare
con
nect
ion
Exte
rnal
dia
. Ø17
PIP
E A
ND
DR
AIN
DIM
EN
SIO
N
PIP
ING
/WIR
ING
DIR
EC
TIO
NP
IPIN
G/W
IRIN
G
DIR
EC
TIO
N
PIP
ING
DIR
EC
TIO
N
Low
er th
an 2
.3m
M
ore
than
200
mm
Hig
her t
han
eye-
leve
l
Mor
e th
an 1
00 m
m
Mor
e th
an 1
00 m
m
Nam
e
1 2 3 4 5 6 7 8
Num
ber
※ R
equi
red
spac
e(un
it:m
m)
Des
crip
ition
(uni
t : m
m)
- 87 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Funtions ......................................................................................88
2. Operation Details........................................................................89
3. Dimensions .................................................................................92
Ceiling & Floor Ceiling Suspended
- 88 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Function
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F).
High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Function
- 89 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
2. Operation Details
Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
(1) The function of main control
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
- 90 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3°C(37°F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40°C(104°F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 91 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).
• The operation diagram is as following.
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
- 92 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
3. Dimensions
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: VE
Cei
ling
& F
loor
AR
NU
09G
VE
A2
AR
NU
12G
VE
A2
Not
e1.
Uni
t sho
uld
be in
stal
led
in c
ompl
ianc
e w
ith th
e in
stal
latio
n m
anua
l
in th
e pr
oduc
t box
.2.
Uni
t sha
ll be
gro
unde
d in
acc
orda
nce
with
the
loca
l reg
ulat
ions
or
a
pplic
able
nat
iona
l cod
es.
WM
odel
AR
NU
09G
VE
A2
AR
NU
12G
VE
A2
HD
900
490
200
(uni
t : m
m)
587
273
※ R
equi
red
spac
e(un
it:m
m)
Nam
e1 2 3 4 5 6 7 8 9 10
Liqu
id p
ipe
Gas
pip
e
Suc
tion
gille
Dis
char
ge g
rille
Sus
pens
ion
brac
ket
Rig
ht s
ide
drai
n ho
se h
ole
Left
side
dra
in h
ose
hole
Wiri
ng c
onne
ctio
n
Pip
ing
conn
ectio
n
Sign
al re
ceive
r & O
pera
tion
indi
cato
r
ø6.3
5 Fl
are
conn
ectio
nø1
2.7
Flar
e co
nnec
tion
Num
ber
Des
crip
ition
(uni
t : m
m)
Slit
hol
eS
lit h
ole
Mor
e th
an 2
00m
m
Mor
e th
an 5
0mm
Mor
e th
an 2
00m
m
Mor
e th
an 2
00m
m
Mor
e th
an 5
0mm
Mor
e th
an 2
00m
m
- 93 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
CH
AS
SIS
CO
DE
: VJ
Cei
ling
Sus
pend
ed
AR
NU
18G
VJA
2A
RN
U24
GV
JA2
Not
e1.
Uni
t sho
uld
be in
stal
led
in c
ompl
ianc
e w
ith th
e in
stal
latio
n m
anua
l
in th
e pr
oduc
t box
.2.
Uni
t sha
ll be
gro
unde
d in
acc
orda
nce
with
the
loca
l reg
ulat
ions
or
a
pplic
able
nat
iona
l cod
es.
WM
odel
AR
NU
18G
VJA
2A
RN
U24
GV
JA2
HD
950
650
220
(uni
t : m
m)
※ R
equi
red
spac
e(un
it:m
m)
Nam
e1 2 3 4 5 6 7 8 9 10 11
Liqu
id p
ipe
Gas
pip
e
Suc
tion
gille
Dis
char
ge g
rille
Sus
pens
ion
brac
ket
Rig
ht s
ide
drai
n ho
se h
ole
Left
side
dra
in h
ose
hole
Wiri
ng c
onne
ctio
n
Pip
ing
conn
ectio
n
Rig
ht s
ide
drai
n pi
pe c
onne
ctio
n
Left
side
dra
in p
ipe
conn
ectio
n
ø6.3
5 Fl
are
conn
ectio
nø1
2.7
Flar
e co
nnec
tion
Num
ber
Des
crip
ition
(uni
t : m
m)
Slit
hol
eS
lit h
ole
Slit
hol
eS
lit h
ole
Mor
e th
an 7
00m
mM
ore
than
300
mm
Mor
e th
an 7
00m
- 94 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Function ......................................................................................95
2. Operation Details........................................................................96
3. Dimensions .................................................................................99
Floor Standing Type
- 95 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Function
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F).
High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.
Function
- 96 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
(1) The function of main control
Thermal ON Thermal OFF
Indoor Unit mode ST+0.5 ST-0.5
2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature
contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.
Remo. Mode ST+0.5 ST-0.5
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
- 97 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3°C(37°F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40°C(104°F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 98 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).
• The operation diagram is as following.
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
- 99 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: CE
Flo
or S
tand
ing
AR
NU
073C
EA
2A
RN
U09
3CE
A2
AR
NU
123C
EA
2A
RN
U15
3CE
A2
AR
NU
073C
EU
2A
RN
U09
3CE
U2
AR
NU
123C
EU
2A
RN
U15
3CE
U2
Not
e1.
Uni
t sho
uld
be in
stal
led
in c
ompl
ianc
e w
ith th
e in
stal
latio
n m
anua
l
in th
e pr
oduc
t box
.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
<W
ith C
ase>
<W
ithou
t Cas
e>
1067
(42)
1067
(42)
148.
3(5
-13/
16)
148.
3(5
-13/
16)
49(15/16)
70(2-3/4)635(25)
203(
7-15
/16)
978(
38-1
/2)
794(
31-5
/16)
639(31-1/4)
13(1
/2) 20.4(3/4) 6.28
(1/4)
190(
7-7/
16)
161(
6-5/
16)
14(1
/2)
WM
odel
AR
NU
073C
EA
2A
RN
U09
3CE
A2
AR
NU
123C
EA
2A
RN
U15
3CE
A2
HD
1067
(42)
635
(25)
203
(7-1
5/16
)
AR
NU
073C
EU
2A
RN
U09
3CE
U2
AR
NU
123C
EU
2A
RN
U15
3CE
U2
978
(38-
1/2)
639
(31-
1/4)
190
(7-7
/16)
[Uni
t : m
m(in
ch)]
[Uni
t : m
m(in
ch)]
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
1
2
Nam
e
1
Air
disc
harg
e gr
ill
2
Air
suct
ion
grill
Num
ber
Des
crip
ition
- 100 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: CF
Flo
or S
tand
ing
AR
NU
183C
FA2
AR
NU
243C
FA2
AR
NU
183C
FU2
AR
NU
243C
FU2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
1
2<
With
Cas
e>
<W
ithou
t Cas
e>
203(7-15/16)
1345
(52-
15/1
6)
635(25)70(2-3/4)
148.
3(5
-13/
16)
1048
.4(4
1-1/
4)
49.5(1-15/16)
148.
3(5
-13/
16)
190(
7-7/
16)
161(
6-5/
16)
14(1
/2)
1256
(49-
7/16
1098
(43-
1/4)
1072
(42-
3/16
)10
9.8(
4-5/
16)
30(1
-3/1
6)
81.4(3-3/16) 145(5-11/16)
70(2-3/4)
21.4(1-3/16)639(31-1/4)
WM
odel
AR
NU
183C
FA2
AR
NU
243C
FA2
HD
1345
(52-
15/1
6)63
5(2
5)20
3(7
-15/
16)
AR
NU
183C
FU
2A
RN
U24
3CF
U2
1256
(49-
7/16
)63
9(3
1-1/
4)19
0(7
-7/1
6)
[Uni
t : m
m(in
ch)]
203(
7-15
/16)
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
Nam
e
1
Air
disc
harg
e gr
ill
2
Air
suct
ion
grill
Num
ber
Des
crip
ition
(uni
t : m
m)
- 101 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Funtions ....................................................................................102
2. Operation Details......................................................................103
3. Dimensions ...............................................................................107
Vertical Air Handling Unit
- 102 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Funtions
1. FuntionsIndoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Deice (defrost) control (Heating)
Auto Restart
Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F)
Central Control(Optional) • It is operating individually or totally by central control function.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temperature.
• Indoor fan is delayed for 5 seconds at the starting.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.
• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.• If the electric heater has been installed, indoor fan continuous
will be.
- 103 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
2. Operation Details
n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller
and the operation diagram is as following.
(1) The function of main control
Intake Air Temperature
Thermo. ON(SET TEMPERATURE +0.5°C(33°F))
Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low
- 104 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Thermal
Outdoor fan
Indoor fan
4way valve
Setting Temperature(Thermal ON)
Setting Temperature +3C(37F)
(Thermal OFF)
Indoor unitHeat-Exchangertemperature
T LT
T ST
1minMinimum
3min 1min
3min
Settingfan
spped
Settingfan
spped
Settingfan
spped
40C(104F)
T On
T Off
ON
ON
ON
ON
LowLowLowLowLow OffOffOff
ON
OFF
OFF
Low fan during 10sec
A
A
B
C
B
Intake Air Temperature
• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40C(104F), fan operates at low speed, when it becomes lower than 40C(104F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.
- To be operated "Low" except initial Hotstart operation
C
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
Vertical Air Handling Unit
NJ NK
19°C(66°F) 19°C(66°F)
22°C(72°F) 22°C(72°F)
25°C(76°F) 25°C(76°F)
27°C(80°F) 27°C(80°F)
- 105 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Hot-Start Control
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 22℃(71.6℉).
• The operation diagram is as following.
ON ON
Off Off LowLow
1 min
Hotstart On
Hotstart Off
Indoor unitHeat-Exchanger
temperature
Setting fanspeed
Setting fanspeed
ThermalOutdoor fan
Indoor fan
4way Valve ON
1 min
• Initial Hotstart On state
¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation
Chassis
Hotstart On T On
Hotstart Off T Off
Low temperature T LT
Setting Temperature T ST
High Static Low Static Convertible
BH BG BR
19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)
22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 22°C(72°F) 27°C(80°F) 27°C(80°F)
25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 25°C(76°F) 28°C(82°F) 28°C(82°F)
27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 27°C(80°F) 30°C(86°F) 30°C(86°F)
B1 B2 CE CF VE VJ
- 106 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Operation Details
n Heater Operation
• The unit will operate according to the setting temperature and the indoor unit Heat-Exchanger temperature.
• Heater operation diagram is shown as following.
Heater 2Heater 1
45℃ (113℉)
30℃ (86℉)
42℃ (108℉)
28℃ (82℉)
Indoor unitHeat-Exchangertemperature
Setting temperature (A)
A-1℃ (34℉)
A-2℃ (36℉)
ON ON
OFF OFF
ON ON
Heater ON Heater ON Heater OFF
- 107 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
3. Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,LG
Ele
ctro
nics
US
A, H
VA
C D
ivis
ion
1000
Syl
van
Ave
nue,
Eng
lew
ood
Clif
fs, N
J 07
632
ww
w.lg
usa.
com
/ w
ww
.lghv
ac.c
om64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: NJ
Ver
tical
Air
Han
dlin
g U
nit
AR
NU
183N
JA2
AR
NU
243N
JA2
AR
NU
303N
JA2
AR
NU
363N
JA2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
Nam
e
1
Liqu
id p
ipe
conn
ectio
n
2
Gas
pip
e co
nnec
tion
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air d
isch
arge
6
Air s
uctio
n
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
Uni
t siz
e(18
k):ø
6.35
(1/4
)U
nit s
ize(
24k,
30k)
:ø9.
52(3
/8)
Unit
size(
18k)
:ø12
.7(1
/2)
Unit
size(
24k,
30k)
:ø15
.88(
5/8)
5
41(
1-5/
8)40
331(13)
40(1
-9/1
6)
364(
14-5
/16)
1236
(48-
5/8)65
(2-9
/16)
117.
5(4-
5/8)
254(10)
543(
21-3
/8)
457(18)
432(17)
308(
12-1
/8)40
(1-9
/16)
46(1
-13/
16)
1
2
6
3
4
- 108 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Dimensions
76, S
eong
san-
dong
, Cha
ngw
on C
ity, G
yeon
gnam
,64
1-71
3, K
orea
ww
w.lg
eairc
on.c
om
CH
AS
SIS
CO
DE
: NK
Ver
tical
Air
Han
dlin
g U
nit
AR
NU
423N
KA
2A
RN
U48
3NK
A2
AR
NU
543N
KA
2
Not
e
1. U
nit s
houl
d be
inst
alle
d in
com
plia
nce
with
the
inst
alla
tion
man
ual
in
the
prod
uct b
ox.
2. U
nit s
hall
be g
roun
ded
in a
ccor
danc
e w
ith th
e lo
cal r
egul
atio
ns o
r
app
licab
le n
atio
nal c
odes
.
LG E
lect
roni
cs U
SA
, HV
AC
Div
isio
n10
00 S
ylva
n A
venu
e, E
ngle
woo
d C
liffs
, NJ
0763
2w
ww
.lgus
a.co
m /
ww
w.lg
hvac
.com
635(25)
308
(12-
1/8)
40(1
-9/1
6)
41(1
-5/8
)40
(1-9
/16)
40(1
-9/1
6)
118
(4-5
/8)
362
(14-
1/4)
39(1
-9/1
6)65
(2-9
/16)
1400
(55-
1/8)
1418
(55-
13/1
6)
508(20)
430(16-15/16)
49(1
-15/
16)
540
(21-
1/4)
55(2-3/16)
52(2-1/16)
610(24)
Nam
e
1
Liqu
id p
ipe
conn
ectio
n Un
it size
(28k
,36k
,42k
):ø9.
52(3
/8)
2
Gas
pip
e co
nnec
tion
Unit s
ize(2
8k,3
6k,4
2k):ø
15.8
8(5/
8)
3
Dra
in p
ipe
conn
ectio
n
4
Pow
er s
uppl
y co
nnec
tion
5
Air
disc
harg
e
6
Air
suct
ion
Num
ber
Des
crip
ition
[Uni
t : m
m(in
ch)]
4
5
23
6
1
- 109 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Part 3Trouble shooting guide
- 110 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Self-diagnosis function ...................................................................111
Trouble shooting guide
- 111 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Self-diagnosis function
Self-diagnosis function
Self-Diagnosis Function
Error Indicator• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.• If more than two troubles occur simultaneously, lower number of error code is first displayed.• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2011 ’ 051 : No.105 error of master unit
Display Title Cause of Error
Indo
or u
nit r
elate
d er
ror
0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short
0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short
0 3 -Transmission error : wired remote controller↔ indoor unit
Failing to receive wired remote controller signal in indoor unit PCB
0 4 - Drain pump Malfunction of drain pump
0 5 - Transmission error : outdoor unit ↔ indoor unit Failing to receive outdoor unit signal in indoor unit PCB
0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short
0 7 - Different operation mode Operation mode between indoor unit and outdoor unit is different
0 9 - Serial No.In case when the serial number marked onEEPROM of Indoor unit is 0 orFFFFFF
1 0 - Poor fan motor operationDisconnecting the fan motor connector/Failure of indoor fan motor lock
Air temperature sensor of indoor unit is open or short
- 112 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
Self-diagnosis function
** In case the value is more than 100kΩ (open) or less than 100Ω (short), Error occurs
Refer: Resistance value maybe change according to temperature of temp sensor,It shows according to criteria of current temperature(±5% margin) ‘ NormalAir temp sensor: 10°C(50°F) = 20.7kΩ : 25°C(76°F)= 10kΩ : 50°C(122°F)= 3.4kΩPipe temp sensor: 10°C(50°F) = 10kΩ : 25°C(76°F)= 5kΩ : 50°C(122°F)= 1.8kΩ
n Error diagnosis and countermeasure flow chart
Is sensor properly connected to PCB?
Is the resistance value of sensor normal?*
Connect properly to PCB
Change the sensor
Change the PCB
Yes
Yes
No
No
Measure the resistance of outlet pipe temp sensor.
CN_PIPE/OUT: Pipe outlet temp sensor
CN_ROOM: Indoor air temp sensorCN_PIPE/IN: Pipe inlet temp sensor
ErrorNo.
Error Type Error Point Main Reasons
01 Indoor unit air sensor errorIndoor unit sensor is
open/short
1. Indoor unit PCB wrong connection2. Indoor unit PCB failure3. Sensor problem (main reason)
02 Indoor unit pipe inlet sensor error
06 Indoor unit pipe outlet sensor error
<Standard Indoor Unit>
<Fresh Air Intake Unit>
- 113 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
* If there is no remote controller to replace : Use another unitʼs remote controller doing well
** Check cable : Contact failure of connected portion or extension of cable are main causeCheck any surrounded noise ( check the distance with main power cable) ‘ make safe distance from the devices generate electromagnetic wave
*** After replacing indoor unit PCB, do Auto Addressing & input unitʼs address if connected to central controller.(All the indoor units connected should be turned on before Auto Addressing
03 No transmission between cabledremote controller & indoor unit
ErrorNo.
Error Type Error Point Main Reasons
The remote controllerdid not receive the sig-nal from indoor unitduring specific time
1. Remote controller fault
2. Indoor unit PCB fault
3. Connector fault, Wrong connection
4. transmission cable problem
n Error diagnosis and countermeasure flow chart
CN-REMO : Remote controller connection
The PCB can differ from model to model.Check from the right source.
Checking transmission cable connection status
Does the error happens again if the remote
controller is replaced?*
Does the error occurred when the cable of remote
controller is replaced?
Replace cabled remote controller
Check connection & transmission cable **
Replace indoor unit PCB ***
Yes
Yes
No
No
Self-diagnosis function
- 114 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Drain pump/float switch fault
04 Drain pump error2. Improper drain pipe location, clog-
ging of drain pipe
3. Indoor unit PCB fault
ErrorNo.
Error Type Error Point Main Reasons
Error diagnosis and countermeasure flow chart
Float switch is open due torising of condensate waterlevel because of drainpump fault or drain pipeclogging
Is the drain pan filled half with condensate water? (half level of
float switch)*
Is drain pump working?(Sound/drain noise/
contact etc.)
Replace float switch
Replace Indoor PCB or reconnect the connector
Yes
Yes
No
No Is Float switch short On measuring its
resistance?
No
Yes
Drain pump blocked byforeign particles?
Yes
In indoor unit PCB Does the terminal voltage
for drain pump has 208/230V output?**
Replace indoor unit PCB
Replace Drain Pump
Yes
Remove it & clean the pump
No
* If the float goes up higher than a half of float switch then the circuit is open & the unit is stopped automatically.
Self-diagnosis function
- 115 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
*** Indoor PCB drain pump connector
(Check input of 208/230V)
(Marked as CN-DPUMP)
float
A:Point to check rotating
Float switch Housing (CN-FLOAT)
Float switch connector
[***] Standard of drain pipe head height / slope
MAX 450
700mm(27-9/16inch)
Self-diagnosis function
- 116 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
1. Auto addressing is not done2. transmission cable is not connected3. Short circuit of transmission cable4. Indoor unit transmission circuit fault
05 5. Outdoor unit transmission circuit fault 6. Not enough distance between power and trans-
mission cable?
ErrorNo.
Error Type Error Point Main Reasons
No signal transmissionbetween indoor & outdoorunits.
Indoor & Outdoor unittransmission error
Does all the IDUs show same error code CH05?
Is outdoor PCB LEDblinking?
Yes
Yes
No
Is main circuit breaker off?No
Check the main power supply at the ODU
terminal block?
Improper connection of power supply cable
Main power supply problem
Yes
No
Yes
No
Outdoor PCB faultReplace after checking
Re connect transmission cableNo
Yes
Indoor PCB faultReplace after checking
* (Note1) Transmission from IDU is normal if voltage fluctuation(-9V ~ +9V) exists when checking DC voltage of communication terminal between IDU and ODU
Is total number of indoor units connected displayed
after auto addressing?
No
END
* If the DC voltage between transmission terminal A, B of indoor unit is fluctuate within (-9V~+9V) then transmission from outdoor unit is normal
Check the insulation of inverter/ constant compressor and replace if required
Check the capacity of main circuit breaker and replace if required
If all ok,Turn on main circuit breaker
Replace outdoor PCB afterchecking
Replace TRANS after checking
Replace the PCB of indoor unitdisplayed error
Re-connect after check thetransmission cable of indoorunit displayed error**
Check if the transmission cable is properly connected to indoor / outdoor terminal block?*
n Error diagnosis and countermeasure flow chart
Self-diagnosis function
- 117 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
06Refer to CH02
ErrorNo.
Error Type Error Point Main Reasons
Indoor unit outlet pipetemperature sensor openor short
Indoor unit outlet pipetemperature sensorerror
071. Indoor units are in different mode2. PCB fault3. cabled remote controller faultj Checking ch07 methodIDU doesnʼt operate as Operation mode is flickering at IDU wired remote controller and IDU display window.
ErrorNo.
Error Type Error Point Main Reasons
The Indoor units startedlater are operated in dif-ferent mode from earlierone.
All Indoor units are notrunning in same mode
n Error diagnosis and countermeasure flow chart
* Check mode selection setting of wired remote controller.
** Outdoor main PCB dip switch no.5 (Cooling) or no.6 (heating) is in On, different mode operation error
may occur because the operation mode is fixed by dip switch setting.
© Dip switch Setting ©
*** Dissolution method CH07 with remote controller
1) Error removal method : Turn off remote controller by pressing the On/Off button on the cabled remote controller. The error code will be removed automatically after few seconds.With cableless remote controller: Turn off indoor unit, and then turn on by changing the operationmode. The error will disappear.
Is operation mode of outdoor & Indoor units
same?
Adjust outdoor main PCBdip switch setting *
Yes
No
END
Does error code disappear
after set operation mode same?**
Replace Indoor PCB***No
Yes
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Self-diagnosis function
- 118 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
091. Error developed in transmission between the
micro- processor and the EEPROM on the sur-face of the PCB.
2. ERROR due to the EEPROM damage
ErrorNo.
Error Type Error Point Main Reasons
Indoor unit EEPROMerror
n Error diagnosis and countermeasure flow chart
**** After replacing the indoor unit PCB, make sure to be done to do Auto addressing and input the address of central control
***** If ODU Dry Contact function is set , different mode operation error may be occurred because the operation mode is fixed.
- Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control
Self-diagnosis function
- 119 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only
10Indoor unit BLDC fan motorfailure
ErrorNo.
Error Type Error Point Main Reasons
Indoor BLDC fan motorfeedback signal is absent(for 50 sec.)
1. Motor connector connection fault2. Indoor PCB fault3. Motor fault
n Error diagnosis and countermeasure flow chart
Is connector connection proper?
Yes
No Connect properly
Is fan motor normal?*
Replace indoor unit fan motor
* It is normal when check hall sensor of indoor fan motor as shown below
Yes
No
k
Replace indoor unit PCB **
<Checking connection state of fan motor connector>
1 4 5 6 7
1
5
6
7
4
4
4
4
Each termainl with the tester
Tester
TH chassis
hundreds kΩ hundreds kΩ
hundreds kΩ hundreds kΩ
+ - TD chassis
Normal resistance(±10%)
** Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB)
Self-diagnosis function
P/NO : MFL50459505 NOVEMBER, 2010