Panasonic WH-UD07CE5-A Service Manual page 85

Diagnosis display Abnormality / Protection control
F41 PFC control
F42 Outdoor heat exchanger temperature
sensor abnormality
F43
Outdoor defrost sensor abnormality
F45 Indoor water outlet temperature sensor
abnormality
F46 Outdoor Current Transformer open
circuit
F95
Cooling high pressure overload
protection
Abnormality Judgement
4 times occurrence within 10
minutes
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
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Primary location to verify
• Voltage at PFC
• Outdoor heat exchanger temperature
sensor (defective or disconnected)
• Outdoor defrost sensor (defective or
disconnected)
• Water outlet temperature sensor
(defective or disconnected)
• Insufficient refrigerant
• Outdoor PCB
• Compressor low
• Outdoor high pressure sensor
• Water pump or water leakage
• Clogged expansion valve or strainer
• Excess refrigerant
• Outdoor PCB