Panasonic WH-SDC09H3E8 Service Manual page 160

Diagnosis display Abnormality/Protection control
Outdoor compressor overheating
F20
protection
IPM (power transistor) overheating
F22
protection
Outdoor Direct Current (DC) peak
F23
detection
F24 Refrigeration cycle abnormality
Cooling/Heating cycle changeover
F25
abnormality
F27 Pressure switch abnormality
F29 Low Discharge Superheat
F30 Water outlet sensor 2 abnormality
F32 Abnormal Internal Thermostat
Outdoor air temperature sensor
F36
abnormality
Indoor water inlet temperature sensor
F37
abnormality
Outdoor discharge pipe temperature
F40
sensor abnormality
F41 PFC control
Outdoor heat exchanger temperature
F42
sensor abnormality
F43 Outdoor defrost sensor abnormality
Indoor water outlet temperature sensor
F45
abnormality
Outdoor Current Transformer open
F46
circuit
Outdoor EVA outlet temperature sensor
F48
abnormality
Outdoor bypass outlet temperature
F49
sensor abnormality
Cooling high pressure overload
F95
protection
Note: * This error code is not applicable for this system.
Abnormality judgement
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.
1 times occurrence within
2550 minutes
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
4 times occurrence within 10
minutes
Continue for 5 sec.
Continue for 5 sec.
Continue for 5 sec.
—
Continue for 5 sec.
Continue for 5 sec.
—
160
Primary location to verify
 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
 Discharge Temperature Sensor
 Discharge Pressure Sensor
 Pressure Switch
 Outdoor PCB
 Water outlet sensor 2 (defective or
disconnected)
 Control panel PCB thermostat
 Outdoor air temperature sensor
(defective or disconnected)
 Water inlet temperature sensor
(defective or disconnected)
 Outdoor discharge pipe temperature
sensor (defective or disconnected)
 Voltage at PFC
 Outdoor heat exchanger temperature
sensor (defective or disconnected)
 Outdoor defrost sensor (defective or
disconnected)
 Water outlet temperature sensor
(defective or disconnected)
 Insufficient refrigerant
 Outdoor PCB
 Compressor low
 Outdoor EVA outlet temperature sensor
(defective or disconnected)
 Outdoor bypass outlet temperature
sensor (defective or disconnected)
 Outdoor high pressure sensor
 Water pump or water leakage
 Clogged expansion valve or strainer
 Excess refrigerant
 Outdoor PCB