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17.5.23 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.
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Check the U, V and W conector connection:
- Turn OFF the power.
- Check the U, V and W conector connection
at outdoor PCB and compressor terminal.
Is the connector connection normal?
From the disconnected harnesses U, V and
Disconnect the harnesses U, V and W from
the compressor terminal.
Is the blinking of the 6 LEDs in same
sequence/condition?
●
IPM defective.
●
Replace outdoor unit PCB.
NO
●
Connector poor contact.
●
Correct the connection.
NO
YES
●
Replace compressor.
condition.
Check the inverter checker 6 LEDs blinking
Turn ON the power and operate the system.
W, correct them to the inverter checker.
YES
Caution
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