Panasonic AQUAREA WH-ADC0912K6E5AN - Page 189

189
Diagnosis display Abnormality/Protection control Abnormality judgement Primary location to verify
F20
Outdoor compressor overheating
protection
4 times occurrence within
30 minutes
 Compressor tank temperature sensor
 Clogged expansion valve or strainer
 Insufficient refrigerant
 Outdoor PCB

Compresso
r
F22
IPM (power transistor) overheating
protection
3 times occurrence within
30 minutes
 Improper heat exchange

IPM
(
Power transistor
)
F23
Outdoor Direct Current (DC) peak
detection
7 times occurrence
continuously
 Outdoor PCB

Compresso
r
F24 Refrigeration cycle abnormality
2 times occurrence within
30 minutes
 Insufficient refrigerant
 Outdoor PCB

Compressor low compression
F25
Cooling/Heating cycle changeover
abnormality
4 times occurrence within
30 minutes
 4-way valve

V-coil
F27 Pressure switch abnormality Continue for 1 min.
 Pressure switch
F29 Low Discharge Superheat
1 times occurrence within
2550 minutes
 Discharge Temperature Sensor
 Discharge Pressure Sensor
 Pressure Switch

Outdoor PCB
F30 Water outlet sensor 2 abnormality Continue for 5 sec.
 Water outlet sensor 2 (defective or
disconnected
)
F32 Abnormal Internal Thermostat Continue for 5 sec.

Control panel PCB thermostat
F36
Outdoor air temperature sensor
abnormality
Continue for 5 sec.
 Outdoor air temperature sensor
(
defective or disconnected
)
F37
Indoor water inlet temperature sensor
abnormality
Continue for 5 sec.
 Water inlet temperature sensor
(defective or disconnected)
F40
Outdoor discharge pipe temperature
sensor abnormality
Continue for 5 sec.
 Outdoor discharge pipe temperature
sensor (defective or disconnected)
F41 PFC control
4 times occurrence within
10 minutes
 Voltage at PFC
F42
Outdoor heat exchanger temperature
sensor abnormality
Continue for 5 sec.
 Outdoor heat exchanger temperature
sensor (defective or disconnected)
F43 Outdoor defrost sensor abnormality Continue for 5 sec.
 Outdoor defrost sensor (defective or
disconnected)
F45
Indoor water outlet temperature sensor
abnormality
Continue for 5 sec.
 Water outlet temperature sensor
(defective or disconnected)
F46
Outdoor Current Transformer open
circuit
—
 Insufficient refrigerant
 Outdoor PCB

Compressor low
F48
Outdoor EVA outlet temperature sensor
abnormality
Continue for 5 sec.
 Outdoor EVA outlet temperature sensor
(defective or disconnected)
F49
Outdoor bypass outlet temperature
sensor abnormality
Continue for 5 sec.
 Outdoor bypass outlet temperature
sensor (defective or disconnected)