62
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[dA] 1. Power supply failure.
Abnormal overheat of heat sink 2. Outdoor fan error.
Refer to outdoor unit 3. Heat sink installation failure.
4. Blockage of heat sink cooling duct.
5. Defective inverter PC board.
Is power supply voltage normal ?
Is the wiring connector
connection normal on the
inverter PC board ?
Is there a blockage in the heat
sink cooling duct ?
Check inverter PC board.
Check power supply.
Check fan and fan motor.
Remove blockage.
j
j
j
h
h
h
No
Ye s
No
Ye s
No
Ye s
Is there a screw loose on the
IGBT module or heat sink on
inverter PC board ?
Tighten screws.
j
h
Ye s
No
Is outdoor fan normal ?
Check the circuit wiring, for example wiring to the
inverter compressor or connector connection.
j
h
No
Ye s
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