LG Electronics General Wall Mounted-Inverter Type manual Electronic Parts Troubleshooting Guide

Part 4 Trouble Shooting

6. ElectronicPartsTroubleshootingGuide

Trouble 1 The Product doesn’t operate at all. (9~30kBtu/h Model)

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?

Does "Lighting" LED is mounted on the outdoor PCB?

NO

Check the voltage of power(AC 208~230V, 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 Module(SMPS), IC01D,IC04D)

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	: DC 220V~390V
	Module(SMPS)
2)	The output voltage of Power	: 15V 10%	Replace the P.C.B.
	Module (SMPS)
3)	IC01D(LD1085), IC04D(7805)	: DC 5V

Service Manual 41