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4、Malfunction of the outer door motor
4.1. Check item
1) Is input voltage nor
mal？
2) Is the connecting way of exterior connecting terminal correct？
3) Is indoor and outdoor communication normal？
4.2. Fault diagnosis procedure
Note：Each air conditioner is correspondent with an outdoor unit and two indoor units and a
set of controller. Please check accordingly.
Outdoor unit has two independent sets of systems. with a common fan. There may be cases
when one of the systems work well and the other doesn't. and this needs to observe the
running of compressor to make a judgment.
1 Unplug the power and re-plug after about 5 seconds
2 Is outdoor controller normal?
3 Is output voltage of relay normal? Socket connection is correct
4 Outdoor unit abnormal
5 Check according to “powerless” diagnosis part
6 Relay abnormal
7 Replac
e relay
5. Repeating motor of transmit fan blade is out of work
5.1. Check item
1）Input voltage is normal？
2）Whether step motor reliable tie CN2？
5.2. Fault diagnosis procedure
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