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16.5.28 Compressor Rotation Failure (F14)
Malfunction Decision Conditions:
A compressor rotation failure is detected by checking the compressor running condition through the position
detection circuit.
Malfunction Caused:
1 Compressor terminal disconnect.
2 Faulty outdoor unit PCB (main).
3 Faulty compressor.
Abnormality Judgment:
Continue 4 times in 20 minutes.
Is the blinking of the 6 LEDs in
same sequence/condition?
Yes
Disconnect the harnesses U, V, and
W from the compressor terminal.
From the disconnected harnesses U, Y, and
W, connect them to the inverter checker. Turn
ON the power and operate the system. Check
the inverter checker 6 LEDs blinking condition.
-IPM defective
- Replace the outdoor unit PCB
(main)
No
Replace the compressor.
Check the U, V, and W connector connection:
- Turn OFF the power
- Check the U, V, and W connector connection at
outdoor unit PCB (main) and compressor terminal
- Connector poor contact
- Correct the connection
Is the connector connection
normal?
No
Yes
Outdoor unit
PCB (main)
Compressor
terminal
Inverter
checker
Inverter
checker
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
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