Air-Conditioners For Building Application
TECHNICAL & SERVICE MANUAL
Model name<Indoor unit>Model name<Indoor unit>
PEFY-P-NMHU-E2
Series PEFY
2013
INDOOR UNIT
2HWE12120
CONTENTSSAFETY PRECAUTIONS ············································································ 31. FEATURES ··························································································· 52. PART NAMES AND FUNCTIONS ······························································ 6
2-1. Indoor (Main) Unit ..................................................................................................................62-2. Remote controller...................................................................................................................6
3. SPECIFICATION ···················································································· 83-1. Specification...........................................................................................................................83-2. Electrical parts specifications .................................................................................................9
4. OUTLINES AND DIMENSIONS ································································105. WIRING DIAGRAM ················································································ 116. REFRIGERANT SYSTEM DIAGRAM ························································127. TROUBLESHOOTING ············································································13
7-1. How to check the parts ........................................................................................................137-2. Setting of address switch .....................................................................................................147-3. Setting of Dip-switch (at delivery) ........................................................................................157-4. Attention for test run .............................................................................................................157-5. Function the LED of the indoor unit service board ...............................................................15
8. DISASSEMBLY PROCEDURE ·································································168-1. Service panel .......................................................................................................................168-2. Control box...........................................................................................................................178-3. Fan .......................................................................................................................................198-4. LEV•Pipe thermistor .............................................................................................................208-5. Drain pump•Drain sensor .....................................................................................................218-6. Drain pan ............................................................................................................................228-7. Heat exchanger ...................................................................................................................23
3HWE12120
SAFETY PRECAUTIONS
1. Before installation and electric work
Before installing the unit, make sure you read all the “Safety precautions”.
The “Safety precautions” provide very important points regarding safety. Make sure you follow them.
This equipment may cause the adverse effect on the same supply system.
Please report to or take consent by the supply authority before connection to the system.
Symbols used in the text Warning:
Describes precautions that should be observed to prevent danger of injury or death to the user.
Caution:Describes precautions that should be observed to prevent damage to the unit.
Symbols used in the illustrations: Indicates an action that must be avoided.: Indicates that important instructions must be followed.: Indicates a part which must be grounded.: Indicates that caution should be taken with rotating parts. (This
symbol is displayed on the main unit label.) <Color: Yellow>: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
Warning:Carefully read the labels affixed to the main unit.
Warning:•Ask the dealer or an authorized technician to install the air
conditioner.- Improper installation by the user may result in water leakage,
electric shock, or fire.•Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in injuries.
•Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.- Inadequate connection and fastening may generate heat and
cause a fire.•Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.- Improper installation may cause the unit to topple and result in
injury.•Always use an air cleaner, humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.- Ask an authorized technician to install the accessories. Improper
installation by the user may result in water leakage, electric shock, or fire.
•Never repair the unit. If the air conditioner must be repaired, consult the dealer.- If the unit is repaired improperly, water leakage, electric shock, or
fire may result.•Do not touch the heat exchanger fins.
- Improper handling may result in injury.•If refrigerant gas leaks during installation work, ventilate the
room.- If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
•Install the air conditioner according to this Installation Manual.- If the unit is installed improperly, water leakage, electric shock, or
fire may result.•Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire Regulations” and the instructions given in this manual and always use a special circuit.- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.•Keep the electric parts away from water (washing water etc.).
- It might result in electric shock, catching fire or smoke.•Securely install the cover of control box and the panel.
- If the cover and panel are not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.
•When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant specified on the unit.- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be damaged.
•If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.- Consult the dealer regarding the appropriate measures to prevent
the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.
•When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.- If the air conditioner is installed improperly, water leakage, elec-
tric shock, or fire may result.•After completing installation work, make sure that refrigerant
gas is not leaking.- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.•Do not reconstruct or change the settings of the protection
devices.- If the pressure switch, thermal switch, or other protection device is
shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.
•To dispose of this product, consult your dealer.•Do not use a leak detection additive.
SAFETY PRECAUTIONS
4HWE12120
SAFETY PRECAUTIONS
Warning:•Note the following when building a heater in the air
conditioning system.- Leave enough space between units for proper ventilation so that
the indoor unit temperature does not exceed 40°C when windless.- Keep the heater clean, and take appropriate measures so that
the indoor unit does not suck in the dust particles that accumulate on the heater.
- Use the optional heater cable (PAC-YU24HT) to perform an interlocked operation with indoor units.
- Do not build a heater inside the indoor unit.
Recommended circuit
FS1
FS2FS1
FS2
RS
RS
CN24
H288H
H188H
26H88H
Wiring diagram
1-phase powersupply208V, 230V/60Hz
Control board
FS1, 2 ----- Thermal fuseH1, H2 ----- Heater26H --------- Overheat protection
thermostat88H --------- Electromagnetic contactor
2. Precautions for devices that use R410A refrigerant
Caution:•Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.
•Use refrigerant piping made of C1220 (Cu-DHP) phosphorus deoxidized copper as specified in the *JIS H3300 “Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.* JIS: Japanese Industrial Standard
•Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)- If dust, dirt, or water enters the refrigerant cycle, deterioration of
the oil and compressor trouble may result.•Use ester oil, ether oil or alkylbenzene (small amount) as the
refrigerator oil to coat flares and flange connections.- The refrigerator oil will degrade if it is mixed with a large amount
of mineral oil.•Use liquid refrigerant to fill the system.
- If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.
•Do not use a refrigerant other than R410A.- If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the refrigerator oil to deteriorate.•Use a vacuum pump with a reverse flow check valve.
- The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.
•Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)- If the conventional refrigerant and refrigerator oil are mixed in the
R410A, the refrigerant may deteriorated.- If water is mixed in the R410A, the refrigerator oil may deteriorate.- Since R410A does not contain any chlorine, gas leak detectors
for conventional refrigerants will not react to it.•Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.•Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.
5HWE12120
FEATURES
1. FEATURES[Series PEFY] Ceiling Concealed
Indoor unit
ModelsCooling capacity/Heating capacity
kW BTU / hPEFY-P15NMHU-E2PEFY-P18NMHU-E2PEFY-P24NMHU-E2PEFY-P27NMHU-E2PEFY-P30NMHU-E2PEFY-P36NMHU-E2PEFY-P48NMHU-E2PEFY-P54NMHU-E2
4.4 / 5.05.3 / 5.97.0 / 7.97.9 / 8.88.8 / 10.010.6 / 11.714.1 / 15.815.8 / 17.6
15000 / 1700018000 / 2000024000 / 2700027000 / 3000030000 / 3400036000 / 4000048000 / 5400054000 / 60000
6HWE12120
PART NAMES AND FUNCTIONS-Indoor (Main) Unit
2. PART NAMES AND FUNCTIONS2-1. Indoor (Main) Unit
Air outlet
Air inlet
2-2. Remote controllerPAR-21MAA
Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
<1> Operation buttons
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION CLEAR
TEST
TEMP.
MENU
BACK DAYMONITOR/SET
CLOCK
ON/OFF
1
2
3
4d 5 6 8 9
0
c
a
b7
1 [Set Temperature] Button 5 [Louver] Button 0 [Test run] Button
2 [Timer Menu] Button [Operation] Button a [Filter] Button
[Monitor/Set] Button 6 [Fan Speed] Button [ ] Button
3 [Mode] Button 7 [Airflow Up/Down] Button b [ON/OFF] Button
[Return] Button 8 [Ventilation] Button c Position of built-in room temperature
4 [Timer On/Off] Button [Operation] Button d [Set Time] Button
[Set Day] Button 9 [Check/Clear] Button
• Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.
• Never place any obstacle around the lower right-hand section of the remote controller. Doing so can result in the erroneous measurement of room temperature.
7HWE12120
PART NAMES AND FUNCTIONS-Remote controller
<2> Display
C
C
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
CHECK
CHECK MODEFILTER
TEST RUNFUNCTION
1Hr.
NOT AVAILABLESTAND BY DEFROST
TEMP.
M
FK
A P
B
C
E
DOLG NI H JQ
A Current time/Timer
B Centralized control
C Timer OFF
D Timer indicator
E Operation mode: COOL, DRY, AUTO, FAN, HEAT
F “Locked” indicator
G Set temperature
H Power ON
I Louver
J Ventilation
K Filter sign
L Set effective for 1 hr.
M Sensor position
N Room temperature
O Airflow
P Fan speed
8HWE12120
SPECIFICATION-Specification
3. SPECIFICATION3-1. SpecificationPEFY-P-NMHU-E2
Model
Item
PEFY-P15NMHU-E2
PEFY-P18NMHU-E2
PEFY-P24NMHU-E2
PEFY-P27NMHU-E2
PEFY-P30NMHU-E2
Power sourse 208/230V, 60Hz
Capacity*1
CoolingkW 4.4 5.3 7.0 7.9 8.8
BTU/h 15000 18000 24000 27000 30000
HeatingkW 5.0 5.9 7.9 8.8 10.0
BTU/h 17000 20000 27000 30000 34000
Dimension
Heightmm 380
in 15
Widthmm 745 1030
in 29-6/16 40-9/16
Depthmm 900
in 35-7/16
Net weightkg 44 45 56
lb 98 100 124
FAN
Airflow rate(Low-High)
m3/min 10.0-14.0 10.0-14.0 13.5-19.0 15.5-22.0 18.0-25.0
cfm 353-494 353-494 477-671 547-777 636-883
External staticpressure *3 Pa
208V (100, 250)
230V (150), 250
Noise level (Low-High) *2 dB(A) 39-45 39-45 40-46 38-44 38-44
PEFY-P-NMHU-E2
Model
Item
PEFY-P36NMHU-E2
PEFY-P48NMHU-E2
PEFY-P54NMHU-E2
Power sourse 208/230V, 60Hz
Capacity*1
CoolingkW 10.6 14.1 15.8
BTU/h 36000 48000 54000
HeatingkW 11.7 15.8 17.6
BTU/h 40000 54000 60000
Dimension
Heightmm 380
in 15
Widthmm 1195
in 47-1/16
Depthmm 900
in 35-7/16
Net weightkg 69 71
lb 153 157
FAN
Airflow rate(Low-High)
m3/min 26.5-38.0 26.5-38.0 28.0-40.0
cfm 936-1342 936-1342 989-1412
External staticpressure *3 Pa
208V (100, 250)
230V (150), 250
Noise level (Low-High) *2 dB(A) 40-46 40-46 41-47
Notes: *1 Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling: Indoor: 26.7 °C [80 °F] DB/19.4 °C [67 °F] WB Outdoor: 35 °C [95 °F] DB Heating: Indoor: 21.1 °C [70 °F] DB Outdoor: 8.3 °C [47 °F] DB/6.1 °C [43 °F] WB
*2 The operating noise is the data that was obtained in an anechoic room.*3 Factory settings: Power supply voltage 230 V
External static pressure 250 Pa
9HWE12120
SPECIFICATION-Electrical parts specifications
3-2. Electrical parts specificationsModel
Parts nameSymbol
PEFY- P15
NMHU-E2
PEFY- P18
NMHU-E2
PEFY- P24
NMHU-E2
PEFY- P27
NMHU-E2
PEFY- P30
NMHU-E2
PEFY- P36
NMHU-E2
PEFY- P48
NMHU-E2
PEFY- P54
NMHU-E2
Tranrsformer T (Primary) 50/60Hz 220-240V (Secondry) (23.5V 0.9A)
Room temperature thermistor TH21 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ,
30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ
Liquid pipe thermistor TH22 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ,
30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ
Gas pipe thermistor TH23 Resistance 0°C [32°F]/15kΩ, 10°C [50°F]/9.6kΩ, 20°C [68°F]/6.3kΩ, 25°C [77°F]/5.4kΩ, 30°C [86°F]/4.3kΩ, 40°C [104°F]/3.0kΩ
Fuse(Indoor controller board)
FUSE 250V 6.3A
Fan motor(with Innerthermostat)
MF1, 24-pole
Output130W NC-45VMS
4-pole Output130W NC-45VMS
4-pole Output180W NC-71VMS
4-pole Output190W NC-90VMS-W
4-pole Output190W NC-90VMS-W
4-pole Output400W NC-112VMS-W
4-pole Output400W NC-112VMS-W
4-pole Output400W NC-112VMS-W
Innerthermostat(Fan motor) OFF 135ºC ±5ºC ON 86ºC ±15ºC
Fan motor capacitor C1 4μF×440V 4μF×440V 5μF×440V 8μF×440V 10μF×440V 11μF×440V 11μF×440V 11μF×440V
Linear expansion valve LEV
DC12V Stepping motor drive port dimension ø 3.2
( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)
DC12V Stepping motor drive port dimension ø 5.2
( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)
DC12V Stepping motor drive port dimension ø 6.4( 0~1800pulse <at R410A outdoor unit> 0~2000pulse <at the other outdoor unit>)
Power supply terminal bed TB2 (L1, L2, G) 250V 20A
Transmission terminal bed
TB5 (M1, M2, S) 250V 20A
TB15 (1, 2) 250V 15A
Drain pump DP
Disconnect the connector, and measure the resistance using a tester. (Ambient temp.: 20ºC)
Normal Abnormal
399Ω Open or short circuit
Drain sensor DS0°C/6.0kΩ,10°C/3.9kΩ20°C/2.6kΩ,25°C/2.2kΩ30°C/1.8kΩ,40°C/1.3kΩ
10HWE12120
OUTLINES AND DIMENSIONS
4. OUTLINES AND DIMENSIONSPEFY-P15·18·24·27·30·36·48·54NMHU-E2
Unit :mm(in.)
DE
GH
FA
CB
ø6.3
5ø1
2.7
ø9.5
2ø1
5.88
1085
1250
PEFY
-P27
∙30N
MH
U-E
2
PEFY
-P36
∙48∙
54N
MH
U-E
2
(31-
1/2)
(42-
3/4)
(49-
1/4)
1039
1204
754
(29-
11/1
6)
(40-
15/1
6)
(47-
7/16
)
965
1130
680
(38)
(44-
1/2)
885
1050
600
(23-
5/8)
(34-
7/8)
(41-
3/8)
835
1000
550
(21-
11/1
6)
(32-
7/8)
(39-
3/8)
42.5 2550 (2)
(1-1
1/16
)
(1)
17 2111
800
1000
(19-
11/1
6)
(31-
1/2)
(39-
3/8)
(1/4
)
(3/8
)70
0
900
(17-
3/4)
(27-
9/16
)
(35-
7/16
)
J
67 5050 (2)
(2-1
1/16
)
(2)L
K
(26-
13/1
6)80
0
15 191050
045
0(1
/2)
(5/8
)
PEFY
-P24
NM
HU
-E2
PEFY
-P15
∙18N
MH
U-E
2
Not
e 1.
Use
an
M10
scr
ew fo
r the
sus
pens
ion
bolt
(fiel
d su
pply
).
2. K
eep
the
serv
ice
spac
e fo
r the
mai
nten
ance
from
the
botto
m
w
hen
the
heat
exc
hang
er is
cle
aned
.
3. T
his
draw
ing
is fo
r PE
FY-P
27∙3
0∙36
∙48∙
54N
MH
U-E
2 m
odel
s,
w
hich
hav
e 2
fans
.PE
FY-P
15∙1
8∙24
NM
HU
-E2
mod
els
have
1 fa
n.
4. M
ake
sure
to in
stal
l the
air
filte
r (fie
ld s
uppl
y) o
n th
e ai
r int
ake
side
.
In
cas
e fie
ld s
uppl
ied
air f
ilter
is u
sed,
atta
ch it
whe
re th
e fil
ter s
ervi
ce is
eas
ily d
one.
Air i
nlet
Air o
utle
t
Mod
el
Gas
pip
e1
L
iqui
d pi
pe2
2×5-
ø3(1
/8) h
oles
15(5
/8)
L
50(2)
50x(J-1)=K (2x(J-1)=K)
23(15/16)B(Suspension bolt pitch)
A
60(2
-3/8
)81
4(32
-1/1
6)
904(
35-5
/8)
15(5
/8)
29(1
-3/1
6)
900(
35-7
/16)
24(1
)84
7(33
-3/8
)
10(7
/16)
41
E(Duct)
94(3
-3/4
)25
0(9-
7/8)
2×J-
ø3(1
/8) h
oles
14358
25(1)50x4=200
50(2)
326.5(12-7/8)
6918
7
180
164.
5
432(
17-1
/16)
50(2)
45(1-13/16)50x5=250
380(15)
F
50(2)
40(1-5/8)
65(2-9/16)C
50x(G-1)=H (2x(G-1)=H)
10(7
/16)
16(1
1/16
)34
0(13
-7/1
6)
D(Duct)
(Duc
t)
Sus
pens
ion
bolt
hole
(Sus
pens
ion
bolt
pitc
h)
80(3-3/16)
(2x4=7-7/8)
(2-3
/4)
(7-1
/8)
(6-1
/2)
4-14
×30(
9/16
x1-3
/16)
Slo
t2×
G-ø
3(1/
8) h
oles
(7-3
/8)
(Duc
t)
(2-5/16)
Term
inal
blo
ck
Term
inal
box
(Pow
er s
ourc
e)
Con
trol b
oxD
rain
pum
p
Dra
in p
ipe
braz
ing
conn
ectio
n (g
as)
Term
inal
blo
ck
(2x5=9-7/8)
Dra
in p
ipe
Dra
in p
ipe
(O.D
.Ø32
(1-1
/4))
2×6-
ø3(1
/8) h
oles
braz
ing
conn
ectio
n (li
quid
)
(O.D
.ø32
(1-1
/4))
(5-11/16)
(1-5/8)
(Em
erge
ncy
drai
n)(O
.D.ø
32(1
-1/4
))(G
ravi
ty d
rain
)
62(2-1/2)
115(4-9/16)
44.5(1-13/16)
115(4-9/16)
(Tra
nsm
issi
on)
Term
inal
blo
ck
29
34(1-3/8)
(1-3/16)
700(27-9/16) Max
300(
11-1
3/16
) or l
ess
(Act
ual l
engt
h)
Dra
in h
ose
<Acc
esso
ry>
(I.D
.ø32
(1-1
/4))
0 -10
65
(2-9
/16
)
-7/1
6 0
20(13/16) or more 20(13/16) or more
Acc
ess
door
Cei
ling
surfa
ce
Mak
e th
e ac
cess
doo
r at t
he a
ppoi
nted
pos
ition
pro
perly
fo
r ser
vice
mai
nten
ance
.
Note2
50(2
)50
(2)
M
625(
24-5
/8)
450(1
7-3/4)
100~
200(
3-15
/16~
7-7/
8)
150~
200(
5-15
/16~
7-7/
8)
700(
27-9
/16)
450(
17-3
/4)Ac
cess
doo
r
1065
1230
PEFY
-P27
∙30N
MHU
-E2
PEFY
-P36
∙48∙
54NM
HU-E
2
(30-
3/4)
(4-1
5/16
)
(48-
7/16
)
780
Mod
el
Req
uire
d sp
ace
for s
ervi
ce a
nd m
aint
enan
ce.
MPE
FY-P
15∙1
8∙24
NMHU
-E2
R
efrig
eran
t pip
ing
1 R
efrig
eran
t pip
ing
2
11HWE12120
WIRING DIAGRAM
5. WIRING DIAGRAMPEFY-P15·18·24·27·30·36·48·54NMHU-E2
M 1~
F1 AC25
0V
CN
31
C
*inse
rt
DSt°
2
54
32
DP
65
43
23
2
(Blu
e)
31
(Red
)
G
PO
WE
R S
UP
PLY
AC
208
V/2
30V
60
Hz
3
33
4
44
56
8
88
9
99
T
CN
54C
N70
2 1M1
S(S
HIE
LD)
M2 TB
15
TO O
UTD
OO
R U
NIT
B
C C
ON
TRO
LLE
R
RE
MO
TE C
ON
TRO
LLE
R
TB5
TO M
A R
EM
OTE
CO
NTR
OLL
ER
t°TH
21
t° t°TH
23
INSI
DE
SEC
TIO
N O
F C
ON
TRO
L BO
X
X01
LEV
M
1~
54
32
6
S.B
.
DSA1ZN
R1
UC
N1
1 3(Y
ello
w)
X06
X04
X05
LED
2
LED
1
CN
62C
N82
1
23 4 5 678
0
8 7
65
432
1
1
0
14
32
TB2
(Yel
low
)
1
11
CN
51
8
88
1
I.B.
9
99
SW
2S
W3
15
CN
418
U
1
1 1C
N42
CN
32
CN
52
1C
N60
5S
W4
4
91
TH22
12
CN
211
CN
3A
2 3
3 1
45
6
7890
9ABCDEF
31
CN
3T
A.B
.
SW
11
13
2
(Red
)
4
75
31
MF
CN
D(R
ed)
53
13
1
11
1
2
CN
29
54
3(R
ed)
2
SW
7
76
(Gre
en)
(Bla
ck)
8
(Blu
e)
(Blu
e)C
NT
CN
2M1
SW
1
2
13
24
CN
81
56
7
(Red
)
2
31
3
(Blu
e)(R
ed)
CN
27(R
ed)
12
M
CN
P1
3
33
65
4
3
L2L1
SWA
SWC
OFF
2
ON
SW5
SW
E2
2
CN
20
1
1
(Gre
en)
(Yel
low
)
CN
22
CN
24
()
(BRA
NCH
No.)
(1s
digi
t)S
W12
SW
14
6.3A T
ZNR
(10t
hs d
igit)
PAR
TS L
OC
ATIO
N
NA
ME
SY
MB
OL
CN
52C
N51
CN
41C
N32
CN
27C
N24
CN
22S
WE
(I.B
.)S
WC
(A.B
.)S
WA
(A.B
.)S
W7(
A.B
.)S
W5(
A.B
.)S
W4(
I.B.)
SW
3(I.B
.)S
W2(
I.B.)
SW
1(A
.B.)
SW
14(A
.B.)
SW
12(A
.B.)
SW
11(A
.B.)
TH23
TH22
TH21
LEV
X01,
X04~
X06
CDS
DPT
DS
A1
ZNR
,ZN
R1
F1TB15
TB5
TB2
S.B
.A
.B.
I.B.
MF
SY
MB
OL
EX
PLA
NAT
ION
SYM
BOL
LED
ope
ratio
n un
der n
orm
al s
tate
At a
pply
ing
mai
n po
wer
sou
rce
→ L
ight
ing
LED
1A
t rec
eivi
ng M
A tra
nsm
issi
on p
ower
sou
rce
→ L
ight
ing
LED
2
OPER
ATIO
N OF
LED
FOR
INDO
OR C
IRCU
IT B
OARD
SER
VICE
208V
250
Pa
230V
250
Pa
208V
100
Pa/
230V
150
Pa
Volta
ge,
Ext
erna
l sta
tic p
ress
ure
Conn
ecto
r
Whi
teB
lue
Red
Con
nect
or (R
emot
e in
dica
tion)
Con
nect
or (C
entra
lly c
ontro
l)C
onne
ctor
(HA
term
inal
-A)
Con
nect
or (R
emot
e sw
itch)
Con
nect
or (D
ampe
r)C
onne
ctor
(Hea
ter)
Con
nect
or (F
an c
ontro
l) C
onne
ctor
(em
erge
ncy
oper
atio
n)S
witc
h(fo
r mod
el s
elec
tion)
Sw
itch(
for m
odel
sel
ectio
n)S
witc
h(fo
r mod
el s
elec
tion)
Sw
itch(
for m
odel
sel
ectio
n)S
witc
h(fo
r mod
el s
elec
tion)
Sw
itch(
for m
ode
sele
ctio
n)S
witc
h(fo
r cap
acity
cod
e)S
witc
h(fo
r mod
e se
lect
ion)
Sw
itch
(BR
AN
CH
No.
set)
Sw
itch
(10t
hs d
igit
addr
ess
set)
Sw
itch
(1s
digi
t add
ress
set
)Th
erm
isto
r (pi
ping
tem
p.de
tect
ion/
gas)
Ther
mis
tor (
pipi
ng te
mp.
dete
ctio
n/liq
uid)
Ther
mis
tor (
inle
t air
tem
p.de
tect
ion)
Ele
ctro
nic
linea
r exp
an. v
alve
Aux
. rel
ayC
apac
itor
Dra
in s
enso
rD
rain
pum
pTr
ansf
orm
erA
rres
ter
Varis
tor
Fuse
AC
250V
6.3
A T
Tran
smis
sion
term
inal
blo
ckTr
ansm
issi
on te
rmin
al b
lock
Pow
er s
ourc
e te
rmin
al b
lock
Sur
ge a
bsor
ber b
oard
Add
ress
boa
rdIn
door
con
trolle
r boa
rdFa
n m
otor
NO
TE : 1
. Sym
bols
use
d in
wiri
ng d
iagr
am a
bove
are
,
:Con
nect
or,
:T
erm
inal
,
(H
eavy
dot
ted
line)
:Fie
ld w
iring
2
. To
perfo
rm a
dra
inag
e te
st fo
r the
dra
in p
ump
turn
on
the
SW
E
on
the
cont
rol b
oard
whi
le th
e in
door
uni
t is
bein
g po
wer
d.
Be
sure
to tu
rn o
ff th
e S
WE
afte
r com
plet
ing
a dr
aina
ge te
st o
r tes
t run
.
3. U
se c
oppe
r sup
ply
wire
.
C
S.B
.
I.B.
TB15 TB
5
T
TB2
A.B
.CO
NTRO
L BOX
12HWE12120
REFRIGERANT SYSTEM DIAGRAM
6. REFRIGERANT SYSTEM DIAGRAM
Strainer (#100-mesh)
Built-in strainers (#100-mesh and #50-mesh)
Heat exchanger
Room temperature thermistor TH21
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Linear expansion valve
Gas pipe
Brazed connection
mm <in.>
CapacityItem PEFY-P15,18NMHU-E2 PEFY-P24,27,30NMHU-E2 PEFY-P36,48,54NMHU-E2
Gas pipe ø 12.7 (1/2) ø 15.88 (5/8)Liquid pipe ø 6.35 (1/4) ø 9.52 (3/8)
13HWE12120
TROUBLESHOOTING-How to check the parts
7. TROUBLESHOOTING7-1. How to check the parts
Parts name Check pointsRoom temperature thermistor (TH21)Liquid pipe thermistor (TH22)Gas pipe thermistor (TH23)
Disconnect the connector, then measure the resistance using a tester.(Sorrounding temperature 10°C~30°C [50°F~86°F])
Normal Abnormal (Refer to the <Thermistor characteristic graph>)4.3kΩ~9.6kΩ Open or short
TransformerCNT
3T13
CN3TDisconnect the connector and measure the resistance using a tester.
Normal AbnormalCNT(1)-(3) App.15Ω
Open or shortCN3T(1)-(3) App.4Ω
Fan motor PEFY-P15~54
Relay connector A…OrangeB…BlueC…RedD…BrownE…BlackF…Gray
Thermal protector Capacitor
BDE
A
L1
F C CP
B FD A EC C
L2 L3
M A
Measure the resistance between the terminals using a tester. (at 20°C [68°F])
Unit :ΩMotor terminal
orRelay connector
NormalAbnormal
PEFY-P15,18 PEFY-P24 PEFY-P27,30 PEFY-P36,48,54
M 30.9 24.6 24.0 6.26
Open or shortA 46.9 34.7 29.1 8.19L1 4.08 2.81 2.94 0.740L2 8.95 4.03 3.56 0.741L3 7.77 6.06 4.35 2.07
Linear expansion valve
123456
LEV
White
YellowOrange
BlueRed
Brown
CN60Disconnect the connector then measure the resistance valve using a tester.
Normal Abnormal(1)-(5)
White-Red(2)-(6)
Yellow-Brown(3)-(5)
Orange-Red(4)-(6)
Blue-Brown Open or short200Ω ±10%
Drain Pump (Drain water lift up kit)
1
3
Red
Red
Disconnect the connector then measure the resistance valve using a tester.(Sorrounding temperature 20°C~30°C [68°F~86°F])
Normal Abnormal399Ω Open or short
<Thermistor characteristic graph>Room temperature thermistor (TH21)Liquid pipe thermistor (TH22)Gas pipe temperature thermistor (TH23)Drain sensor (DS)Thermistor R0=15kΩ ± 3%Fixed number of B=3480kΩ ± 2%Rt=15exp 3480 ( 1
273+t − 1273 )
0°C 32°F 15kΩ10°C 50°F 9.6kΩ20°C 68°F 6.3kΩ25°C 77°F 5.2kΩ30°C 86°F 4.3kΩ40°C 104°F 3.0kΩ
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
Temperature
(˚C)-4 14 32 50 68 86 104 122 [˚F]
Res
ista
nce
(KΩ
)
Drain sensor (Drain water lift up kit)
13
Measure the resistance between the terminals using a tester. (Refer to the <Thermistor characteristic graph>)
0°C/6.0kΩ, 10°C/3.9kΩ20°C/2.6kΩ, 25°C/2.2kΩ30°C/1.8kΩ, 40°C/1.3kΩ
14HWE12120
TROUBLESHOOTING-Setting of address switch
7-2. Setting of address switchMake sure that power source is turning off.
ONOFF
1 2 3 4 5 6 7 8 9 10
SW1
Indoor unit control board
< At delivery (All models)>
SW2 SW3
CN62
SW1
SW7
ON
ONON
W254665G06JP2
SW14
FP-AD-R
CN82 68 1 1
240V
220V
1
1
0 1 12
AS
SY
2
3 4 5 6 7 8 9 1021
3 4 5 6 7 8 9
G 2 3
1
1O F F
2 3
3
A B C D E F
10JP1
SW5SWCSWA
1
32
SW12 SW110123456789AB
CD
EF 0 1 23
45678
9 0 1 23
45678
9
ONOFF
1 2 543
SW 4
SW4
<1> In case using M-NET remote controller, address is set by rotary switches. (SW11,SW12)* It is not necessary setting address in case of using unit remote controller.
Indoor unit do not run without address setting in field.
<2> Indoor unit address setting rule is different by each field work. Refer to install manual of outdoor unit , operate the address setting.
<3> Setting the address is combination of SW11 (1st digit address setting) and SW12 (2nd digit address setting).
Address “3” setting is composed SW11 “3” and SW12 “0”.Address “25” setting is composed SW11 “5” and SW12 “2”.
15HWE12120
TROUBLESHOOTING-Setting of Dip-switch (at delivery)
7-3. Setting of Dip-switch (at delivery)
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 910 1 2 31 2 3 4 5 6
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3 SW4
5
ONOFF
220V240V
SW5
1 2 3
SW4
5
1 2 3
SW4
5
1 2 3
SW4
5
1 2 3
SW4
5
1 2 3
SW4
5
1 2 3
SW4
5
1 2 3
SW4
5
PEFY-P15NMHU-E2
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
ONOFF
220V240V
SW5PEFY-P18NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
SWA1
SWCStandard
“標準”Indicate
Models Dip-SW
ONOFF
220V240V
SW5PEFY-P27NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6ONOFF
220V240V
SW5PEFY-P24NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
ONOFF
220V240V
SW5PEFY-P36NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
ONOFF
220V240V
SW5PEFY-P48NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
ONOFF
220V240V
SW5PEFY-P54NMHU-E2
SW1ONOFF
SW2ONOFF
ONOFF
SW3ONOFF
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
4
4
4
4
4
4
4
4
1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 9101 2 3 4 5 6
ONOFF
220V240V
SW5PEFY-P30NMHU-E2
SW1 SW2ONOFF
ONOFF
ONOFF
ONOFF
SW3
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
1 2 3
ONOFF
SW7
7-4. Attention for test run Check that the drain-up mechanism is working properly, that no water is leaking from pipe connections, and that the fan is
operating.• For new installation, check the above items before completing ceiling work.
(1) Remove the cover from the water supply inlet on the indoor unit pipe.
(2) Insert the end of the pump or the tank into the drain pump. (Water may leak if it is not inserted properly.) Then, fill the water supply pump from a water supply tank.
(3) Perform a test run in the Cooling mode, or connect the connector to the ON-side of the SWE on the indoor unit control board. (The drain pump and the fan will be forced into operation without being started from the remote controller.)
SWE SWE
OFF ON OFF ON
Connector
<OFF> <ON>
(4) Check for normal operation, stop the test run, and shut off the main power. Disconnect the connector that is connected to the ON-side of SWE, if applicable. Connect it to the OFF-side, and then replace the cover to the water supply inlet as it was.
SWE SWE
OFF ON ONOFF
Connector
<ON> <OFF>
7-5. Function the LED of the indoor unit service boardSymbol LED operation under normal stateLED1 At applying main power source LightingLED2 At receiving MA transmission power source Lighting
16HWE12120
DISASSEMBLY PROCEDURE-Service panel
8. DISASSEMBLY PROCEDURE8-1. Service panel
Procedures Explanatory figure1. Removing the service panel 1 (Figure 1-1)
(1) Remove the four service panel 1 mounting screws.
2. Removing the service panels 2 and 3 (Figure 1-2)(1) Remove the five service panel 3 mounting screws.(2) Remove the two service panel 2 mounting screws.
Service panel 1
Service panel 2
Service panel 3
Figure 1-1
Figure 1-2
17HWE12120
DISASSEMBLY PROCEDURE-Control box
8-2. Control boxProcedures Explanatory figure
1. Removing the control cover (Figure 2-1)(1) Remove the two control box cover mounting screws.(2) Remove the two terminal block cover mounting screws.
* The above procedures will allow for the following services to be performed.
1 Operation and checking of the following switches on the address board of the control boardRotary switch SW11,12 Address settingRotary switch SW14 Port settingDip switch SW1 Function setting 1Dip switch SW2 Capacity settingDip switch SW3 Function setting 2Dip switch SW4 Function settingDip switch SW7 Function settingJumper pin SWE Test runDip switch SWA,SWC Option setting
2 Checking of the wiring connections to the control box (see below) and the field-installed wiringPower wire (Field-connected)Indoor-outdoor transmission line (Field-connected)Remote controller wiring (Field-connected)LEV wiring (Factory-connected)Drain pump wiring (Factory-connected)Drain sensor wiring (Factory-connected)Fan motor wiring (Factory-connected)Indoor temperature thermistor wiring
(Factory-connected)
Liquid pipe temperature thermistor wiring
(Factory-connected)
Gas pipe temperature thermistor wiring
(Factory-connected)
3Replacement of control board
4Replacement of address board
5Replacement of DSA board
6Replacement of capacitor
7Replacement of power supply transformer
8Replacement of fuse
Terminal block cover
Control box cover
Figure 2-1
Control box
Figure 2-2
18HWE12120
DISASSEMBLY PROCEDURE-Control box
Procedures Explanatory figure2. Removing the control box (Figure 2-2)
(1) Disconnect the wiring from the control board and the relay connectors.
LEV1 wiring CN60•6P•White
Fan motor wiringRelay connector• 9P•White
Indoor temperature thermistor wiring CN20•2P•Red
Liquid pipe temperature thermistor wiring CN21•2P•White
Gas pipe temperature thermistor wiring CN29•2P•Black
Drain pump wiringRelay connector• 3P•White
Drain sensor wiring CN31•3P•White
(2) Remove the two control box mounting screws.
19HWE12120
DISASSEMBLY PROCEDURE-Fan
8-3. FanProcedures Explanatory figure
1. Remove the control box and its cover according to the procedures detailed in section 8-2. Control box (page17).
2. Removing the fanP45-71 models (Figures 3-1 and 3-2)(1) Remove the four motor base mounting screws.(2) Loosen the three bellmouth mounting screws, and remove
the bellmouth.(3) Pull out the fan along the guide rail.*Use caution not to pinch the wiring.*Motor is heavy. Use caution to avoid injuries.
P80-160 models (Figures 3-3, 3-4, and 3-5)(1) Loosen the three front bellmouth mounting screws, and
remove the bellmouth.(2) Loosen the sirocco fan set screws, and remove the
sirocco fan.(3) Remove the three front fan case mounting screws.(4) Remove the four motor base mounting screws.(5) Loosen the three back bellmouth, and remove the
bellmouth.(6) Pull out the fan along the guide rail.*Use caution not to pinch the wiring.*Motor is heavy. Use caution to avoid injuries.
Motor base
Motor
Bellmouth
Sirocco fan
Figure 3-1
Figure 3-2
Sirocco fan
BellmouthMotor base
Motor
Fan case
Bellmouth
Set screw
Figure 3-3
Figure 3-4
Figure 3-5
Sirocco fan
20HWE12120
DISASSEMBLY PROCEDURE-LEV•Pipe thermistor
8-4. LEV•PipethermistorProcedures Explanatory figure
1. Remove the service panel according to the procedures detailed in section 8-1. Service panel (page16).
2. Remove the control box cover according to the procedures detailed in section 8-2. Control box (page17).
3. Removing the LEV (Figure 4-1)(1) Disconnect connector CN60 from the control board.(2) Remove the drive motor using two spanners.(3) To remove the valving element, first take the
first four steps in section 8-7. Heat exchanger (page23) to remove the plastic cover. Be sure to protect the surrounding parts, such as insulation and wiring, from flame.
4. Removing the pipe thermistor (Figure 4-2)(1) Disconnect connectors CN21 and CN29 from the
control board.(2) Take the pipe thermistor out of the holder.
Liquid pipe temperature thermistor
Gas pipe temperature thermistor
LEV
Figure 4-1
Figure 4-2
Drive motor
Valving element
Thermistor position listP45
modelP50
modelP71
modelP80
modelP90
modelP112 model
P140 model
P160 model
Liquid pipe temperature thermistor
4th path 7th path 8th path5th
path
Gas pipe temperature thermistor
3rd path 4.5th path3rd path
7th path
4th path
21HWE12120
DISASSEMBLY PROCEDURE-Drain pump•Drain sensor
8-5. Drainpump•DrainsensorProcedures Explanatory figure
1. Remove the service panels 2 and 3 according to the procedures detailed in section 8-1. Service panel (page16).
2. Remove the control box cover according to the procedures detailed in section 8-2. Control box (page17).
3. Disconnect the drain pump relay connector (CN31: white) from the control board.
4. Removing the drain pump assembly (Figure 5-1)(1) Remove the two drain pump mounting screws.
5. Removing the drain pump and drain sensor (Figure 5-2)(1) Remove the two drain pump cover sheet metal
mounting screws.(2) Remove the three drain pump mounting screws.(3) Pull the drain sensor out of the drain pump cover
sheet metal.
Drain pump assemblyFigure 5-1
Figure 5-2
Pump cover sheet metal
Drain sensor
Drain pump
22HWE12120
DISASSEMBLY PROCEDURE-Drain pan
8-6. Drain pan Procedures Explanatory figure
1. Remove the cap from the service panel 3, and check the drain pan for water.Drain water from the drain port if there is any.
*Protect the surroundings with a plastic sheet before draining water.
2. Removing the drain pan (Figure 6-1)(1) Remove the 12 mounting screws from base plate A.(2) Pull down the drain pan. Loosening the mounting screw
on base plate B will make it easy to remove base plate A.*Pull out the drain pan by pulling a little in all directions. Drain pan is made of styrofoam. Handle the drain pan carefully so as not to break it.
Base plate A
Base plate B
Drain pan
Figure 6-1
23HWE12120
DISASSEMBLY PROCEDURE-Heat exchanger
8-7. Heat exchanger Procedures Explanatory figure
1. Remove the LEV and pipe sensor wiring according to the procedures detailed in section 8-4. LEV•Pipe thermistor (page20).
2. Remove the drain pump according to the procedures detailed in section 8-5. Drain pump•Drain sensor (page21).
3. Remove the drain pan according to the procedures detailed in section 8-6. Drain pan (page22).
4. Removing the plastic cover (Figure 7-1)(1) Remove the plastic cover mounting screw from the
outside of the unit, and another mounting screw from inside the unit.
(2) Unhook the plastic cover from the heat exchanger panel.
5. Removing the heat exchanger (Figure 7-2)(1) Remove the two air baffle plate mounting screws.(2) Remove the four heat exchanger mounting screws,
and lower the heat exchanger.
Plastic coverHeat exchanger panel
Figure 7-2
Figure 7-1
Air baffle plate Heat exchanger
New publication, effective Oct. 2013Specifications subject to change without notice
Issued in Oct. 2013 HWE12120Printed in Japan
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
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