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Pioneer WYC009AMFI20 Service Manual page 45

Wyc series single zone split 3d dc inverter+heat pump
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9.3.10 High temperature protection of compressor top diagnosis and solution(P2)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
P2
If the sampling voltage is not 5V, the LED will display the failure.
Power supply problems.
●
System leakage or block
●
PCB faulty
●
43
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