Panasonic S-71WF3E - Page 233

233
Diagnosis display Abnormality/Protection control Abnormality judgement Primary location to verify
H95 Indoor/Outdoor wrong connection —
 Indoor/Outdoor supply voltage
H98 / F95
Outdoor high pressure overload
protection
Cooling high pressure overload
protection
—
 Outdoor high pressure sensor
 Water pump or water leakage
 Clogged expansion valve or strainer
 Excess refrigerant
 Room Air Filter dirty or air circulation
short circuit
H99 Indoor heat exchanger freeze prevention —
 Indoor heat exchanger

Refrigerant shortage
F12 Pressure switch activate
4 times occurrence within
30 minutes
 Pressure switch
F14 Outdoor compressor abnormal revolution
4 times occurrence within
20 minutes
 Power transistor module faulty or
compressor lock
F15 Outdoor fan motor lock abnormality
2 times occurrence within
30 minutes
 Outdoor fan motor lead wire &
connector

Fan motor lock or block
F16 Total running current protection
3 times occurrence within
20 minutes
 Excess refrigerant

Outdoor PCB
F20
Outdoor compressor overheating
protection
3 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
4 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
4 times occurrence within
60 minutes
 Insufficient refrigerant
 Outdoor PCB
 Valve Close
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
F33 Freezing of standby unit error
3 times occurrence within
40 minutes
 Wrong wiring and connecting pipe, or
Expansion valve leakage
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
20 minutes
 Outdoor PCB
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
senso
r
(defective or disconnected)
Note: * This error code is not applicable for this system.