Troubleshooting 38
8.7 PC 01/E5(Over voltage or too low voltage protection)/PC 10(Outdoor unit low AC
voltage protection)/PC 11(Outdoor unit main control board DC bus high voltage
protection)/PC 12(Outdoor unit main control board DC bus high voltage protection
/341 MCE error) Diagnosis and Solution
Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.
Recommended parts to prepare:
• Power supply wires
• IPM module board
• Outdoor PCB
• Bridge rectifier
• PFC circuit or reactor
Troubleshooting and repair:
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