74
15.4.23 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 thw 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
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