172
17.5.28 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.
Troubleshooting:
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 connector connection:
- Turn OFF the power
- Check the U, V, and W connector connection at
outdoor unit PCB (main) and compressor terminal
From the disconnected harnesses U, V, and W,
connect them to the inverter checker. Turn ON
the power and operate the system. Check the
inverter checker 6 LEDs blinking condition.
Is the connector connection
normal?
Is the blinking of the 6 LEDs in
same sequence/condition?
Disconnect the harnesses U, V, and
W from the compressor terminal.
- Connector poor contact
- Correct the connection
Outdoor unit
PCB (main)
Compressor
terminal
- IPM defective
- Replace the outdoor unit PCB
(main)
Replace the compressor.
No
No
Yes
Yes
CORE
3.15A
FUSE
250W
T
L
CORE
R
R
P
M
2T
U
V
W
B
Y
COMPRESSOR
(BLU) BLUE
TRADE MARK
Inverter
checker
COMP. TERMINAL
(RED) RED
(YEL) YELLOW
Red Blue
Yellow
COMMUNICATION
ERROR
INVERTER SIGNAL
Caution