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No
Display keeps showing "Ed".
Check whether the evaporator frosts.
No
Check whether the indoor air inlet is blocked.
Check whether the indoor ambient temperature is too low.
Check whether the indoor dust filter is too dirty.
Check whether there is too much water on the chassis.
Check the wiring of pipe temperature sensor.
Check the pipe temperature sensor. Replace the pipe temperature sensor.
Replace the main control board.
No
No
No
Service Manual
Room Air Conditioner with R-410A
Heat Controller, Inc.
20