Error Codes Table - Panasonic WH-MDC09C3E5 Servise Manual

16.4. Error Codes Table

Diagnosis display Abnormality / Protection control
H00 No abnormality detected
H12 Indoor/Outdoor capacity unmatched
H15 Outdoor compressor temperature sensor
abnormality
H23 Indoor refrigerant liquid temperature
sensor abnormality
H42 Compressor low pressure abnormality
H62 Water flow switch abnormality
H64 Refrigerant high pressure abnormality
H70
Back-up heater OLP abnormality
H72 Tank sensor abnormal
H76 Indoor - remote control communication
abnormality
H90 Indoor / outdoor abnormal
communication
H91
Tank heater OLP abnormality
H95 Indoor/Outdoor wrong connection
H98 Outdoor high pressure overload
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
F20 Outdoor compressor overheating
protection
F22 IPM (power transistor) overheating
protection
F23 Outdoor Direct Current (DC) peak
detection
F24 Refrigeration cycle abnormality
F25 Cooling / Heating cycle changeover
abnormality
F27 Pressure switch abnormality
F36 Outdoor air temperature sensor
abnormality
F37 Indoor water inlet temperature sensor
abnormality
F40 Outdoor discharge pipe temperature
sensor abnormality
Abnormality Judgement
—
90s after power supply
Continue for 5 sec.
Continue for 5 sec.
—
Continue for 1 min.
Continue for 5 sec.
Continue for 60 sec.
Continue for 5 sec.
—
> 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
4 times occurrence within 30
minutes
3 times occurrence within 30
minutes
7 times occurrence
continuously
2 times occurrence within 20
minutes
4 times occurrence within 30
minutes
Continue for 1 min.
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
79
Primary location to verify
—
• Indoor/outdoor connection wire
• Indoor/outdoor PCB
• Specification and combination table in
catalogue
• Compressor temperature sensor
(defective or disconnected)
• Refrigerant liquid temperature sensor
(defective or disconnected)
• Outdoor pipe temperature sensor
• Clogged expansion valve or strainer
• Insufficient refrigerant
• Outdoor PCB
• Compressor
• Water flow switch
• Outdoor high pressure sensor
(defective or disconnected)
• Back-up heater OLP
(Disconnection or activated)
• Tank sensor
• 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
• Compressor tank temperature sensor
• Clogged expansion valve or strainer
• Insufficient refrigerant
• Outdoor PCB
• Compressor
• Improper heat exchange
• IPM (Power transistor)
• Outdoor PCB
• Compressor
• Insufficient refrigerant
• Outdoor PCB
• Compressor low compression
• 4-way valve
• V-coil
• Pressure switch
• Outdoor air temperature sensor
(defective or disconnected)
• Water inlet temperature sensor
(defective or disconnected)
• Outdoor discharge pipe temperature
sensor (defective or disconnected)