Diagnosis display
Abnormality / Protection control
Indoor water inlet temperature sensor
F37
abnormality
Outdoor discharge pipe temperature
F40
sensor abnormality
F41
PFC control
Outdoor heat exchanger temperature
F42
sensor abnormality
F43
Outdoor defrost sensor abnormality
Indoor water outlet temperature sensor
F45
abnormality
Outdoor Current Transformer open
F46
circuit
Cooling high pressure overload
F95
protection
Abnormality Judgement
Continue for 5 sec.
Continue for 5 sec.
4 times occurrence within
10 minutes
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
—
—
69
Primary location to verify
• Water inlet temperature sensor
(defective or disconnected)
• Outdoor discharge pipe temperature
sensor (defective or disconnected)
• 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