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

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Presentation on theme: "Wall Mounted J series Troubleshooting. Troubleshooting area Electrical circuit / hardware Refrigerant circuit / component."— Presentation transcript:

1 Wall Mounted J series Troubleshooting

2 Troubleshooting area Electrical circuit / hardware Refrigerant circuit / component

3 Troubleshooting - electrical Topics: Measuring equipment Measuring equipment Unit fails to start Unit fails to start Error codes Error codes

4 Troubleshooting – electrical Equipment: Clamp meter Clamp meter Multi-meter Multi-meter Thermocouple reader Thermocouple reader Measuring equipment

5 Troubleshooting - electrical Diagnostic Flow Chart Diagnostic Flow Chart 1 Unit fails to start Not applicable

6 Troubleshooting - electrical Diagnostic Flow Chart Diagnostic Flow Chart Unit fails to start 1 Not applicable

7 Troubleshooting - electrical Power supply Power supply Unit fails to start Power source: V Rated running current: 0.17 A

8 Troubleshooting - electrical Fuse Fuse 1.Continuity check 2.Component shorted 3.Loose connection Unit fails to start

9 Troubleshooting - electrical ID fan motor ID fan motor Unit fails to start Black wire

10 Troubleshooting - electrical ID fan motor electrical data ID fan motor electrical data Unit fails to start 230V / Single phase

11 Troubleshooting - electrical OD fan motor cooling model OD fan motor cooling model Unit fails to start

12 Troubleshooting - electrical OD fan motor – heat pump OD fan motor – heat pumpModel Running Current (A) Input Power (W) (5)WM15J/JR - (5)SL15C/CR WM10J/JR - 5SL10C/CR WM09J/JR - SL09C/CR Unit fails to start

13 Troubleshooting - electrical Compressor winding resistance Compressor winding resistance C – CommonMain – C & S S – StartingAuxiliary – R & C R – Running Unit fails to start Remove the cap

14 Troubleshooting - electrical Compressor winding resistance Compressor winding resistance 1. Measure resistance value - main - auxiliary 2. Continuity check – if BEEP sound is obtained > component short Unit fails to start

15 Troubleshooting - electrical Compressor winding resistance Compressor winding resistance Unit fails to start Model Compressor model Single phase ± 7% Main ( ) Aux ( ) WM09J/JR - SL09C/CR 2PS156D3CD WM15J/JR - SL15C/CR 2PS206D2AF WM10J/JR - 5SL10C/CR 5PS102DAL WM15J/JR - 5SL15C/CR 5PS132DBC

16 Troubleshooting - electrical LED error indicators LED error indicators Error codes

17 Troubleshooting - electrical Room sensor contact open/short Room sensor contact open/short Blink 1 time Blink 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 Error codes

18 Troubleshooting - electrical ID coil sensor open/short ID coil sensor open/short Blink 2 times + Blinking Blink 2 times + Blinking C < operating temp. < 68 C Error codes

19 Troubleshooting - electrical OD coil sensor open/short OD coil sensor open/short Blink 3 times Blink 3 times C < operating temp. < 68 C Error codes

20 Troubleshooting- mechanical Refrigerant circuit checks Diagram shows typical charging method. Charging Method

21 Troubleshooting- mechanical Pressure gauge Pressure gauge

22 Pressure measurement Pressure measurement Both valve closed Troubleshooting- mechanical

23 Charging refrigerant LP valve close, HP valve open LP valve open, HP valve close Troubleshooting- mechanical

24 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

25 Vacuum pumping Valve open Troubleshooting- mechanical

26 Compressor Overload Compressor Overload LED 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.

27 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 NO YES Suction = psig Discharge = psig 2.5 – 4 Ampere? Troubleshooting-mechanical YES

28 Troubleshooting-mechanical Gas Leak Gas Leak LED display - Blink 3 times After compressors run time of 30 minutes is achieved, gas leak is declared if: ID coil temperature > 25°C (cooling) or < 20°C ( heating )

29 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 NO YES Suction = psig Discharge = 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. Troubleshooting-mechanical NO YES NO YES

30 Troubleshooting- mechanical Hardware Error (tact switch pin open) Hardware Error (tact switch pin open) LED display - Blink 6 times Possible root cause: ON/OFF tact switch accidentally pressed by front cover and could not restore back to normal position.

31 Troubleshooting- mechanical Visual inspection on the ON/OFF. ON/OFF pressed by cover? Press once on the ON/OFF button for 1 second. YES NO

32 Troubleshooting- mechanical No feedback from indoor fan motor No feedback from indoor fan motor LED display - OFF + Blink 4 times Possible root cause: Incorrect fan motor wire connection / defective fan motor.

33 Troubleshooting- mechanical YES NO Reconnect in correct position. Check fan motor and replace with another motor. Check fan motor wire connection. Correct? `

34 Thank You


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