Panasonic CS-S9TKV Service Manual page 118

15.4.22 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.

Outdoor PCB malfunction.
Troubleshooting
When F93 indication happens
Turn off power supply. Disconnect U, V
and W wires
Measure the winding resistance between
U-V, V-W and U-W
Are the compressor's winding resistance
(U-V, V-W, U-W) shorted?
NO
YES
For safety reason and to prevent component
breakdown, always switch off the power
Caution
before remove and connect the component.
● IPM defective
● Replace outdoor unit PCB
● Replace compressor
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