Error Codes Table - Panasonic WH-MDC05J3E5 Service Manual

19.4 Error Codes Table

Diagnosis display Abnormality/Protection control
H00 No abnormality detected
H12 Indoor/Outdoor capacity unmatched
Outdoor compressor temperature sensor
H15
abnormality
H20 Water pump abnormality
Indoor refrigerant liquid temperature
H23
sensor abnormality
H27 Service valve error
H28 Abnormal solar sensor
H31 Abnormal swimming pool sensor
H36 Abnormal buffer tank sensor
H38 Brand code not match
H42 Compressor low pressure abnormality
H43 Abnormal Zone 1 sensor
H44 Abnormal Zone 2 sensor
H62 Water flow switch abnormality
H63 Abnormal low pressure sensor
H64 Refrigerant high pressure abnormality
H65 Abnormal deice water circulation
H67 Abnormal External Thermistor 1
H68 Abnormal External Thermistor 2
H70 Back-up heater OLP abnormality
H72 Tank sensor abnormal
H74 PCB communication error
H75 Low water temperature control
Indoor - control panel communication
H76
abnormality
H90 Indoor/outdoor abnormal communication
H91 Tank heater OLP abnormality
H95 Indoor/Outdoor wrong connection
Outdoor high pressure overload
H98
protection
H99 Indoor heat exchanger freeze prevention
F12 Pressure switch activate
F14 Outdoor compressor abnormal revolution
F15 Outdoor fan motor lock abnormality
F16 Total running current protection
Abnormality judgement
—
90s after power supply
Continue for 5 sec.
Continue for 10 sec.
Continue for 5 sec.
Continue for 5 minutes
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
When indoor and outdoor
brand code not same
—
Continue for 5 sec.
Continue for 5 sec.
Continue for 1 min.
4 times in 20 minutes
Continue for 5 sec.
water flow > 7 l/min continously
for 20 second during anti
freeze deice
Continue for 5 sec.
Continue for 5 sec.
Continue for 60 sec.
Continue for 5 sec.
Communication or transfer
error
Room heater disable and deice
request to operate under low
water temperature
—
> 1 min after starting operation
Continue for 60 sec.
—
—
—
4 times occurrence within 20
minutes
4 times occurrence within 20
minutes
2 times occurrence within 30
minutes
3 times occurrence within 20
minutes
164
Primary location to verify
—
 Indoor/outdoor connection wire
 Indoor/outdoor PCB
 Specification and combination table in
catalogue
 Compressor temperature sensor
(defective or disconnected)
 Indoor PCB
 Water pump (malfunction)
 Refrigerant liquid temperature sensor
(defective or disconnected)
 High pressure sensor (defective or
disconnected)
 Solar temperature sensor (defective or
disconnected)
 Pool temperature sensor (defective or
disconnected)
 Buffer tank sensor (defective or
disconnected)
—
 Outdoor pipe temperature sensor
 Clogged expansion valve or strainer
 Insufficient refrigerant
 Outdoor PCB
 Compressor
 Water temperature Zone 1 sensor
 Water temperature Zone 2 sensor
 Water flow switch
 Low pressure sensor (defective or
disconnect)
 Outdoor high pressure sensor
(defective or disconnected)
 Water pump
 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
 Outdoor PCB
 Outdoor fan motor
 Excess refrigerant
 Outdoor PCB