Error Codes Table - Panasonic WH-UD28AE Service Manual

16.4. Error Codes Table

Diagnosis display
Abnormality / Protection control
H00 No abnormality detected
H11 Indoor / outdoor abnormal
communication
H14 Indoor water outlet temperature sensor
abnormality
H15 Outdoor compressor temperature sensor
abnormality
H16 Outdoor Current Transformer open
circuit
H23 Indoor refrigerant liquid temperature
sensor abnormality
H27 Outdoor air temperature sensor
abnormality
H28 Outdoor heat exchanger temperature
sensor abnormality
H30 Outdoor discharge pipe temperature
sensor abnormality
H33 Indoor/Outdoor wrong connection
H38 Indoor/Outdoor mismatch
H62 Water flow switch abnormality
H63 Refrigerant low pressure abnormality
H64 Refrigerant high pressure abnormality
H65 Indoor - control panel communication
abnormality
H66 Compressure low pressure abnormality
H68 Indoor water inlet temperature sensor
abnormality
H98 Indoor high pressure overload protection
F11 Cooling / Heating cycle changeover
abnormality
F90 PFC control
F91 Refrigeration cycle abnormality
F93 Outdoor compressor abnormal revolution
F96 IPM (power transistor) overheating
protection
F97 Outdoor compressor overheating
protection
F98 Total running current protection
F99 Outdoor Direct Current (DC) peak
detection
Abnormality Judgement
—
> 1 min after starting operation
Continue for 5 sec.
Continue for 5 sec.
—
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
—
—
Continue for 1 min.
Continue for 5 sec.
Continue for 5 sec.
—
—
Continue for 5 sec.
—
4 times occurrence within 30
minutes
4 times occurrence within 10
minutes
2 times occurrence within 20
minutes
4 times occurrence within 20
minutes
3 times occurrence within 30
minutes
4 times occurrence within 30
minutes
3 times occurrence within 20
minutes
7 times occurrence
continuously
42
Primary location to verify
—
• Internal / external cable connections
• Indoor / Outdoor PCB
• Water outlet temperature sensor
(defective or disconnected)
• Compressor temperature sensor
(defective or disconnected)
• Outdoor PCB
• IPM (Power transistor) module
• Refrigerant liquid temperature sensor
(defective or disconnected)
• Outdoor temperature sensor
(defective or disconnected)
• Outdoor heat exchanger temperature
sensor (defective or disconnected)
• Outdoor discharge pipe temperature
sensor (defective or disconnected)
• Indoor/Outdoor supply voltage
—
• Water flow switch
• Outdoor low pressure sensor
(defective or disconnected)
• Outdoor high pressure sensor
(defective or disconnected)
• Indoor - control panel
(defective or disconnected)
• Compressor
• Water inlet temperature sensor
(defective or disconnected)
• Outdoor ambient temperature too high
• Outdoor intake air block
• 4-way valve
• V-coil
• Voltage at PFC
• No refrigerant
(3-way valve is closed)
• Outdoor compressor
• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)
• Insufficient refrigerant
• Compressor
• Excess refrigerant
• Improper heat radiation
• Outdoor PCB
• IPM (Power transistor)
• Compressor