Panasonic WH-MXF09D3E5 Service Manual page 80

16.5.12. Unspecified Voltage between Indoor and Outdoor (H95)
Malfunction Decision Conditions:
The supply power is detected for its requirement by the indoor/outdoor transmission.
Malfunction Caused:
1. Insufficient power supply.
2. Faulty outdoor unit PCB (noise filter/main).
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