Panasonic CS-VZ9SKE Service Manual page 129

17.4.28 F93 (Compressor Rotation Error)
Troubleshooting
Check for broken expansion valve coil.
After the air conditioner starts operation, does the compressor rotate for a
while (about 1 minute) before it stops?
Check for broken compressor coil.
Check if AC voltage is present between phases on the compressor.
Diagnosis Procedures and Cause
Normal
The compressor rotates for a while
Normal
AC voltage is not present
Coil is broken
The compressor
does not
rotate at all
Coil is broken
AC voltage
is present
129
Measures to be Taken
Replace the expansion valve coil and
compressor.
Replace the outdoor unit control board.
Replace the compressor.
Replace the compressor.
Replace the outdoor unit control board.
If the error is not solved by replacement of
the control board, it is a compressor failure.