Panasonic CS-CZ25ZKE Service Manual page 112

17.5.24 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
When F93 indication happens.
Check the U, V and W conector connection:
- Turn OFF the power.
- Check the U, V and W conector connection
at outdoor PCB and compressor terminal.
Is the connector connection normal?
Disconnect the harnesses U, V and W from
the compressor terminal.
From the disconnected harnesses U, V and
W, correct them to the inverter checker.
Turn ON the power and operate the system.
Check the inverter checker 6 LEDs blinking
condition.
Is the blinking of the 6 LEDs in same
sequence/condition?
NO
YES
NO
YES
For safety reason and to prevent component
breakdown, always switch off the power
Caution
before remove and connect the component.
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112
Connector poor contact.
Correct the connection.
IPM defective.
Replace outdoor unit PCB.
Replace compressor.