Wall Mounted J series Troubleshooting. Troubleshooting area Electrical circuit / hardware...

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Wall Mounted J series Wall Mounted J series

TroubleshootingTroubleshooting


Troubleshooting

Troubleshooting area

Electricalcircuit / hardware

Refrigerantcircuit / component


Troubleshooting - electrical

Topics:Topics:

• Measuring equipmentMeasuring equipment

• Unit fails to startUnit fails to start

• Error codesError codes


Troubleshooting – electrical

Equipment:Equipment:

• ClampClamp metermeter

• Multi-meterMulti-meter

• Thermocouple readerThermocouple reader

Measuring equipmentMeasuring equipment



• Diagnostic Flow ChartDiagnostic Flow Chart

1

Unit fails to startUnit fails to start

Not applicable



• Diagnostic Flow ChartDiagnostic Flow Chart


1

Not applicable



• Power supplyPower supply


Power source: 220-240 V

Rated running current: 0.17 A



• FuseFuse

1. Continuity check

2. Component shorted

3. Loose connection




• ID fan motorID fan motor


Black wire



• ID fan motor electrical dataID fan motor electrical data


230V / Single phase



• OD fan motor cooling modelOD fan motor cooling model




• OD fan motor – heat pumpOD fan motor – heat pump

ModelModel Running Current (A)Running Current (A) Input Power (W)Input Power (W)

(5)WM15J/JR - (5)SL15C/CR(5)WM15J/JR - (5)SL15C/CR 0.260.26 5959

5WM10J/JR - 5SL10C/CR5WM10J/JR - 5SL10C/CR 0.230.23 5252

WM09J/JR - SL09C/CRWM09J/JR - SL09C/CR 0.200.20 4545




• Compressor winding resistanceCompressor winding resistance

C – Common Main – C & S

S – Starting Auxiliary – R & C

R – Running


Remove the cap



• Compressor winding resistanceCompressor winding resistance

1. Measure resistance value - main

- auxiliary

2. Continuity check – if “BEEP” sound

is obtained > component short




• Compressor Compressor winding winding resistanceresistance


ModelModel Compressor Compressor modelmodel

Single phase Single phase ± 7%± 7%

Main (Main ()) Aux (Aux ())

WM09J/JR -WM09J/JR -SL09C/CRSL09C/CR 2PS156D3CD022PS156D3CD02 3.8413.841 4.0214.021

WM15J/JR -WM15J/JR -SL15C/CRSL15C/CR 2PS206D2AF022PS206D2AF02 2.8932.893 4.8004.800

5WM10J/JR - 5WM10J/JR - 5SL10C/CR5SL10C/CR 5PS102DAL015PS102DAL01 3.8633.863 3.3093.309

5WM15J/JR - 5WM15J/JR - 5SL15C/CR5SL15C/CR 5PS132DBC015PS132DBC01 2.6472.647 4.7214.721



• LED error indicatorsLED error indicators

Error codesError codes



• Room sensor contact open/shortRoom sensor contact open/short

Blink 1 timeBlink 1 time

Sensor RTH201

1. Possibility – low

2. Unit design with air opening at the front panel to allow sufficient space for air flow & measurement

3. 10 C < operating temp. < 40 C




• ID coil sensor open/shortID coil sensor open/short

Blink 2 times + BlinkingBlink 2 times + Blinking

- - 10 C < operating temp. < 68 C




• OD coil sensor open/shortOD coil sensor open/short

Blink 3 timesBlink 3 times

- - 10 C < operating temp. < 68 C



Troubleshooting- mechanical

Refrigerant circuit checks

Diagram shows typical charging method.

Charging Method



• Pressure gaugePressure gauge


• Pressure Pressure measurementmeasurement

Both valve closed



• Charging refrigerant

LP valve close, HP valve open LP valve open, HP valve close



Troubleshooting - mechanical

Refrigerant circuit checks

1) Open the service port core cap.2) Connect pressure gauge to the service port.3) Connect the line to vacuum pump. Open the charging manifold valve and turn the pump on. Vacuum to –0.1 MPa (-760mmHg) or lower. (Evacuation time varies by the pump but averagely in 1 hour).

Vacuuming Method


• Vacuum pumping

Valve open



Troubleshooting-mechanical

• Compressor OverloadCompressor Overload

LED display - Blink 1 timeLED display - Blink 1 time

(Cooling)

When OD coil temperature > 68 °C, both the compressor and outdoor fan will stop operating.

(Heating)

When ID coil temperature > 68 °C, the compressor, outdoor fan and 4 way valve will stop operating.


YES

Is the coil sensor correctly connected?

NO Ensure no obstacle around the unit and conduct inspection on coil and filter.

Change compressor.

Connect correctly and operate again.

YES

NO

Sufficient airflow?

Recharging with correct amount of refrigerant.

Is compressor short body?

Change compressor.

Compressor OK

Unit overcharged. Recover all gas.

Replace sensor.

YES

System ok.

Measure ID/OD on coil temperature > 68°C ?

Is the coil sensor resistance characteristics normal?

Measure comp running amp. Within spec?

Measure suction pressure. Within spec?

Measure compressor winding resistance. Within spec ?

NO

YES

YES

NO

NO

NO

NO

NO

YES

Suction = 116-154 psigDischarge = 297-523 psig

2.5 – 4 Ampere?


YES



• Gas Leak Gas Leak

LED display - LED display - Blink 3 timesBlink 3 times

After compressor’s run time of 30 minutes is achieved, gas leak is declared if:

ID coil temperature > 25°C (cooling) or < 20°C ( heating )


Change compressor.

Connect correctly and operate again.

NO

Is compressor short body?

Change compressor.

Compressor OK

Replace sensor.

YES

System ok.

Turn on the unit

Measure suction pressure. Within spec?

Measure compressor winding resistance. Within spec ?

YES

YES

NO

NO

NO

NO

YES

Suction = 116-154 psigDischarge = 297-523 psig

2.5 – 4 Ampere?

Is the coil sensor correctly connected?

Is the coil sensor resistance characteristics normal?

Measure compressor running ampere. Within spec?

Detect the leak point?

Fix the leak point.

Refer to leak detection method.


NO

YES

NO

YES



• Hardware Error (tact switch pin open) Hardware Error (tact switch pin open)

LED display - Blink 6 timesLED display - Blink 6 times

Possible root cause:

ON/OFF tact switch accidentally pressed by front cover and could not restore back to normal position.



Visual inspection on the ON/OFF.

ON/OFF pressed by cover?

Press once on the ON/OFFbutton for 1 second.

YES

NO



• No feedback No feedback from indoor fan from indoor fan motor motor

LED display - LED display - OFF + OFF + Blink 4 timesBlink 4 timesPossible root cause:

Incorrect fan motor wire connection / defective fan motor.



YES

NO Reconnect in correct position.

Check fan motor and replace with another motor.

Check fan motor wire connection. Correct?

`


Thank YouThank You

Wall Mounted J series Troubleshooting. Troubleshooting area Electrical circuit / hardware...

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