Publicité
Diagnosis
Abnormality /
display
Protection control
Refrigerant low
H63
pressure abnormality
Refrigerant high
H64
pressure abnormality
H65
Deice circulation error
Abnormal external
H67
thermistor 1
Abnormal external
H68
thermistor 2
Back-up heater OLP
H70
abnormality
H72
Tank sensor abnormal
PCB communication
H74
error
Low water temperature
H75
control
Indoor - control panel
H76
communication
abnormality
Indoor / Outdoor
H90
abnormal
communication
Tank heater OLP
H91
abnormality
Indoor / Outdoor
H95
wrong connection
Outdoor high pressure
H98
overload protection
Indoor heat exchanger
H99
freeze prevention
F12
Pressure switch active
Outdoor compressor
F14
abnormal revolution
Abnormality
judgement
Continue for 5s
Continue for 5s
Continue for 10s
Continue for 5s
Continue for 5s
Continue for 60s
Continue for 5s
Communication or
transfer error
Room heater disable
and deice request to
operate under low
water temperature
-
> 1 minute after
starting operation
Continue for 60s
-
-
-
4 times occurrence
within 20 minutes
4 times occurrence
within 20 minutes
Primary location to verify
· Outdoor low pressure sensor (defective
or disconnected)
· Outdoor high pressure sensor (defective
or disconnected)
· Water flow switch sensor (defective or
disconnected)
· Water pump malfunction
· Buffer tank (is used)
· Room temperature Zone 1 sensor
· Room temperature Zone 2 sensor
· Back-up heater OLP (disconnection or
activated)
· Tank sensor
· Indoor main PCB and Sub PCB
· Heater operation must enable to increase
water temperature
· Indoor - control panel (defective or
disconnected)
· Internal / External cable connections
· Indoor / Outdoor PCB
· Tank heater OLP (disconnection or
activated)
· Indoor / Outdoor supply voltage
· Outdoor high pressure sensor
· Water pump or water leakage
· Clogged expansion valve or strainer
· Excess refrigerant
· Outdoor PCB
· Indoor heat exchanger
· Refrigerant shortage
· Pressure switch
· Outdoor compressor
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