Air Conditioner Service Manual
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3. If the unit can’t operate, please replace outdoor PCB
11.3.11 Display EC
Reason: The signal communication fault between power module and IPM module.
Solution: Please replace the outdoor PCB.
11.3.12 Display EP
Reason: The compressor top temperature high or the sensor fault.
Solution: Check and replace the sensor or add some gas.
11.3.13 Display PA
Reason: Two or three machine modes collide.
Solution: Check whether one machine run in cooling another machine run in heating or other model.
11.3.14 Display D3.
Reason: Water full (This only apply to cassette or duct type).
Solution: Check and let water drain.
11.13.15 Display CL
Cause: Air filter duty, the unit operation Cumulative time 500 hours, the controller will confirmation the filter
dirty and display CL.
Solution: Clean the air filter then cut off the power and supply again.
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