Wall Mounted J series Troubleshooting. Troubleshooting area Electrical circuit / hardware...
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Transcript of Wall Mounted J series Troubleshooting. Troubleshooting area Electrical circuit / hardware...
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Wall Mounted J series Wall Mounted J series
TroubleshootingTroubleshooting
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Troubleshooting
Troubleshooting area
Electricalcircuit / hardware
Refrigerantcircuit / component
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Troubleshooting - electrical
Topics:Topics:
• Measuring equipmentMeasuring equipment
• Unit fails to startUnit fails to start
• Error codesError codes
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Troubleshooting – electrical
Equipment:Equipment:
• ClampClamp metermeter
• Multi-meterMulti-meter
• Thermocouple readerThermocouple reader
Measuring equipmentMeasuring equipment
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Troubleshooting - electrical
• Diagnostic Flow ChartDiagnostic Flow Chart
1
Unit fails to startUnit fails to start
Not applicable
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Troubleshooting - electrical
• Diagnostic Flow ChartDiagnostic Flow Chart
Unit fails to startUnit fails to start
1
Not applicable
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Troubleshooting - electrical
• Power supplyPower supply
Unit fails to startUnit fails to start
Power source: 220-240 V
Rated running current: 0.17 A
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Troubleshooting - electrical
• FuseFuse
1. Continuity check
2. Component shorted
3. Loose connection
Unit fails to startUnit fails to start
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Troubleshooting - electrical
• ID fan motorID fan motor
Unit fails to startUnit fails to start
Black wire
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Troubleshooting - electrical
• ID fan motor electrical dataID fan motor electrical data
Unit fails to startUnit fails to start
230V / Single phase
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Troubleshooting - electrical
• OD fan motor cooling modelOD fan motor cooling model
Unit fails to startUnit fails to start
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Troubleshooting - electrical
• 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
Unit fails to startUnit fails to start
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Troubleshooting - electrical
• Compressor winding resistanceCompressor winding resistance
C – Common Main – C & S
S – Starting Auxiliary – R & C
R – Running
Unit fails to startUnit fails to start
Remove the cap
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Troubleshooting - electrical
• Compressor winding resistanceCompressor winding resistance
1. Measure resistance value - main
- auxiliary
2. Continuity check – if “BEEP” sound
is obtained > component short
Unit fails to startUnit fails to start
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Troubleshooting - electrical
• Compressor Compressor winding winding resistanceresistance
Unit fails to startUnit fails to start
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
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Troubleshooting - electrical
• LED error indicatorsLED error indicators
Error codesError codes
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Troubleshooting - electrical
• 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
Error codesError codes
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Troubleshooting - electrical
• ID coil sensor open/shortID coil sensor open/short
Blink 2 times + BlinkingBlink 2 times + Blinking
- - 10 C < operating temp. < 68 C
Error codesError codes
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Troubleshooting - electrical
• OD coil sensor open/shortOD coil sensor open/short
Blink 3 timesBlink 3 times
- - 10 C < operating temp. < 68 C
Error codesError codes
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Troubleshooting- mechanical
Refrigerant circuit checks
Diagram shows typical charging method.
Charging Method
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Troubleshooting- mechanical
• Pressure gaugePressure gauge
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• Pressure Pressure measurementmeasurement
Both valve closed
Troubleshooting- mechanical
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• Charging refrigerant
LP valve close, HP valve open LP valve open, HP valve close
Troubleshooting- mechanical
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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
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• Vacuum pumping
Valve open
Troubleshooting- mechanical
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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.
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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?
Troubleshooting-mechanical
YES
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Troubleshooting-mechanical
• 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 )
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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.
Troubleshooting-mechanical
NO
YES
NO
YES
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Troubleshooting- mechanical
• 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.
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Troubleshooting- mechanical
Visual inspection on the ON/OFF.
ON/OFF pressed by cover?
Press once on the ON/OFFbutton for 1 second.
YES
NO
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Troubleshooting- mechanical
• 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.
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Troubleshooting- mechanical
YES
NO Reconnect in correct position.
Check fan motor and replace with another motor.
Check fan motor wire connection. Correct?
`
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Thank YouThank You