AUX Air Conditioner Service manual
42
1 Unplug the power and re-plug after about 5 seconds
2 Turn on air-conditioner with remote controller.
3 LED and digital tube in the indicator board on or not?
4 Confirm “ powerless” error diagnosis steps normal
5 Air blade moves when press “ air flow” ON
6 Normal
7 Voltage changes between the #35.#36.#37.#38 of the internal chip IC6 (square wave)
8 Chip IC6 error
9 Voltage between IC3: 11~14 of the internal chip ULN2003AFW changes?(square wave)
10 Driver chip IC3(ULN2003AFW) is false.
11 Step motor error
6. No hot wind blown in heating mold.
（
only for heat pump unit).
6.1. Check item
1)Confirm temperature set by remote controller is lower than indoor temperature
？
2)Whether confirm that indoor PCB is connected to terminal board correctly or not?
6.2. Fault diagnosis procedure
Summary of Contents for EA Series
Page 1: ...AUX One to Two Split Air Conditioner Service Manual EA EL HS Series ...
Page 48: ...AUX Air Conditioner Service manual 46 9 Fault analysis of major parts ...
Page 58: ...AUX Air Conditioner Service manual 56 b Single Cooling Model ...
Page 60: ...AUX Air Conditioner Service manual 57 Section 10 Service Record Date Page Part Cause Report ...
