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