Panasonic CS-E9PD3EA / CS-E12PD3EA / CU-E9PD3EA / CU-E12PD3EA Service Manual ▷ View online
85
15.5.18 F91 (Refrigeration Cycle Abnormality)
Malfunction Decision Conditions
The input current is low while the compressor is running at higher than the setting frequency.
Malfunction Caused
Lack of gas.
3-way valve close.
Troubleshooting
86
15.5.19 F93 (Compressor Rotation Failure)
Malfunction Decision Conditions
A compressor rotation failure is detected by checking the compressor running condition through the position
detection circuit.
Malfunction Caused
Compressor terminal disconnect
Faulty Outdoor PCB
Faulty
compressor
Troubleshooting
87
15.5.20 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry)
Malfunction Decision Conditions
During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by
the outdoor unit heat exchanger thermistor.
Malfunction Caused
Outdoor heat exchanger temperature rise due to short-circuit of hot discharge air flow.
Outdoor heat exchanger temperature rise due to defective of outdoor fan motor.
Outdoor heat exchange temperature rise due to defective outdoor heat exchanger thermistor.
Outdoor heat exchanger temperature rise due to defective of outdoor unit PCB.
Troubleshooting
88
15.5.21 F96 (IPM Overheating)
Malfunction Decision Conditions
During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature
sensor.
Multi Models only
o
Multi Models only
o
Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated.
o
Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is
detected by the heat sink temperature sensor.
Malfunction Caused
IPM overheats due to short circuit of hot discharge air flow.
IPM overheats due to defective of outdoor fan motor.
IPM overheats due to defective of internal circuitry of IPM.
IPM overheats due to defective IPM temperature sensor.
Multi Models Only
o
o
Compressor OL connector poor contact.
o
Compressor
OL
faulty.
Troubleshooting
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