Error Codes Table - Panasonic WH-MXC09J3E8 Service Manual

17.4 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 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
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
60 times occurence within 480
minutes.
Continue for 5 sec.
Continue for 5 sec.
Continue for 1 min.
4 times in 20 minutes
5V : Continue for 5 sec.
0V : 4 times occurrence within
120 minutes
water flow > 5 l/min
continuously for 20 seconds
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.
—
148
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 sensor
 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