[Da] Abnormal Overheat Of Heat Sink - Toshiba HFCR407C Service Manual

Check code
[dA]
Abnormal overheat of heat sink
Is power supply voltage normal ?
Is the wiring connector
connection normal on the
inverter PC board ?
Is outdoor fan normal ?
Is there a screw loose on the
IGBT module or heat sink on
inverter PC board ?
Is there a blockage in the heat
sink cooling duct ?
Check inverter PC board.
14
Troubleshooting
Diagnostic procedure for check code
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Operation cause
1. Power supply failure
2. Outdoor fan error
3. Heat sink installation failure
4. Blockage of heat sink cooling duct
5. Defective inverter PC board
Check the circuit wiring, for example wiring to the
inverter compressor or connector connection.
112
Check power supply.
Check fan and fan motor.
Tighten screws.
Remove blockage.