Panasonic WH-MXC16J9E8 Service Manual page 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:
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
Is the connector connection
Disconnect the harnesses U, V, and
W from the 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 blinking of the 6 LEDs in
same sequence/condition?
Caution
No
- Connector poor contact
normal? - Correct the connection
Yes
No
Yes
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
- IPM defective
- Replace the outdoor unit PCB
(main)
Replace the compressor.
172
CORE
R
P
2T
U R
V
B
W
Y
COMPRESSOR
M
CORE
FUSE T 3.15A L 250W
Outdoor unit Compressor
PCB (main) terminal
Red Blue Yellow
(YEL) YELLOW
(BLU) BLUE (RED) RED
TRADE MARK
COMP. TERMINAL
COMMUNICATION
ERROR
INVERTER SIGNAL
Inverter
checker