Panasonic CS-TZ20WKEW, Service Manual, Page: 153 / 233

153
18.4.25 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
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
Compressor OL connector poor contact.
o
Compressor OL faulty.
Troubleshooting