Panasonic CS-E9SD3UAW Service Manual page 90

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
When F93 indication happens
Check the U, V and W connector connection:
- Turn OFF the power
- Check the U, V and W connector 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 before
Caution
remove and connect the component.
Connector poor contact
Correct the connection
IPM defective
Replace outdoor unit PCB
Replace compressor
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