Troubleshooting Guide
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Only for training and service purposes
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n Error diagnosis and countermeasure flow chart
n Check Inverter PCB Screw Connection Condition
Error No. Error Type Error Point Main Reasons
62*
Master 621
Slave1 622
Slave2 623
Slave3 624
Inverter PCB Heatsink
Temperature High
Heatsink Temperature
is Over 90°C
1. Inverter PCBA IPM Connection Condition Abnormal
2. Outdoor Unit Fan Motor Operation Abnormal
3. Outdoor Unit Inverter PCB Assembly Defect
4. Overload Operation (Pipe Clogging/ Covering/EEV
Defect/Ref. Overcharge)
Is Installation
Condition Normal?
No
1. Check Pipe Clogging/ Distortion
2. Check Covering (Outdoor/Indoor Unit)
3. Check EEV Connector Assemble Condition/Normal Operation
4. Check Refrigerant Pressure
5. Check Power Wire/ Connection Condition
Reassemble or Manage if abnormality Found
1. Check Inverter PCBA Screw Connection Condition
Reassemble or Manage if abnormality Found
No
Inverter PCB IPM Connection
Condition Normal?
Yes
1. Check Outdoor Unit Fan Motor Operation or Lock
Reassemble or Manage if abnormality Found
No
Is ODU Fan Motor Normal?
Yes
1. Reset
Replace Inverter PCB Assembly
No
Is Inverter PCB assembly
Normal?
Yes
Recheck Power and
Installation Condition
Yes
Check Screw
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