Troubleshooting Guide

ElectronicPartsTroubleshooting Guide

Refer to electronic contorol device drawing & schematic diagram.

Trouble 1

The Product doesn’t operate at all.

Turn off the main power and wait until LED on outdoor PCB is off.

Turn on the main power again.

Does "Beeping" sound is made from the indoor unit?

NO

Check the voltage of power(AC208V/AC230V, 60Hz).

The voltage of main power.

The voltage applied to the unit.

The connecting method of Indoor/Outdoor connecting cable (each color)

The P.W.B. Ass'y

(Fuse, Noise Filter, Power Transformer, IC01D, IC02D, etc.)

YES

Primarily, the operating condi- tion of Micom is O.K.

Check CN-DISP1

The operation check of the P.C.B. Ass'y

 

 

Procedure

 

Specification

 

Remedy

 

 

 

 

 

 

 

1)

The input voltage of power trans-

1)

AC230V ± 30V

1)

Replace

 

 

former.

 

: Check the rated voltage

 

power transfomer.

2)

The output voltage of power

2)

15V ± 1.5V

2)

Replace

 

 

transformer.

 

 

 

power transfomer.

3)

IC01D(7812)

3)

DC12V

3) Replace IC01D.

4)

IC02D(7805)

4)

DC5V

4) Replace IC02D.

5)

IC01A(KIA7036)

5)

The voltage of micom pin 29

5)

Replace IC01A.

 

 

 

 

: DC4.5V

 

 

 

 

 

 

 

 

 

Service Manual 67

Page 67
Image 67
LG Electronics AMNC123DEA0 (LMN120CE) service manual Electronic Parts Troubleshooting Guide, Procedure Specification Remedy

AMNC093APM0(LMAN090CNS), AMNH123DEA0 (LMN120HE), A2UC243FA0 (LMU240CE), AMNH123APM0(LMAN120HNS), A2UH243FA0(LMU240HE) specifications

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