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18.4.24 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 connector connection:
-TurnOFFthepower.
- Check the U, V and W connector connection at
outdoor PCB and compressor terminal.
NO
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.
Disconnect the harnesses U, V and W from the
compressor terminal.
Is the blinking of the 6 LEDs in same
sequence/condition.
Is the connector connection normal?
For safety reason and to prevent
component breakdown, always
switch off the power before remove
and connect the component.
Correct the connection.
Connector poor contact.
NO
YES
YES
Replace outdoor unit PCB.
IPM defective.
Replace compressor.
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