Midea MOU-12HDN1, Service Manual

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MLCAC-UTSM-2010-10 Troubleshooting
Outdoor Units 95
10.3.1.5. Indoor fan Speed has been out of control.(Only for console 12k)
Shut off the power supply and
turn it on 1 minute later. Is it
still displaying the error code?
Shut off the power supply,
rotate the fan by hand. Does
it rotate properly?
The unit operates normally.
Replace indoor fan
motor.
Check the wires of fan motor.
Are all the connections good?
No
Yes
No
Correct the connections. No
Yes
Replace indoor main PCB. Is it
still displaying the error code?
Yes
Yes
Check the voltage between port
1 and 6 of fan motor connector,
is it 310V?
No
DC motor voltage input and output
NO. Color Signal Voltage
1 Red V
DC
310V
2 --- --- ---
3 White Vcc 15V
4 Blue FG 15V
5 Yellow Vsp 0-7.5V
6 Black GND 0V
10.3.1.6. Inverter compressor drive protection (Only for compact cassette 12k & console 12k)
Refer to the outdoor unit P6 malfunction part to solve this problem.
5
4
6
3
2
1