LG Electronics M8004RY4, L8004RY4, HB8004RA4 Possible Trouble Remote controller does not operate

Page 29

Troubleshooting Guide

Possible Trouble 6	Remote controller does not operate.

	Is the voltage of Battery		NO
	over 2.3V?
		YES
		YES
	Is the voltage No.10		NO
	of CN-AC/DC on DC PCB		NO
	of CN-AC/DC on DC PCB
	Ass'y DC 5V?
		YES
		YES
	Is the connection of		NO
	CN-AC/DC OK?

YES

• Replace Receiver Ass'y.

• Replace the battery.

•Check the PCB pattern.

•Check the PCB pattern.

•Connect connector to CN-AC/DC exactly.

Possible Trouble 7

Is IC01G good?

YES

It displays abnormally on DC PCB Ass’y.

NO

NO

• Replace IC01G.

Is the connection of		NO
CN-AC/DC OK?
	YES

Does the IC03G		NO
(Q01G, Q02G, Q03G for Delux Model)
operate normally on DC
PCB Ass'y?
	YES

•Replace the DC PCB Ass'y.

• Connect connector to CN-AC/DC exactly.

• Replace IC03G (Q01G, Q02G, Q03G for Delux Model).

Service Manual 29

Image 29

Contents

LG Room Air Conditioner Table of Contents Do not disassemble or modify products Safety PrecautionsDo not place the power cord near a heater Use the air conditioner on a single outlet circuit Plug in the power plug properlyDo not modify power cord length Be cautious not to touch the sharp edges when installing Do not clean the air conditioner with waterEnsure that the outer case is not damaged by age or wear Do not block the inlet or outletOutside Dimensions DimensionsSymbols Used in this Manual Items Models Product SpecificationsHBLG8004RA4/B4 CL8000ER HBLG1004RInstallation Check InstallationHow to Secure the Drain Pipe Select the Best LocationWindow Requirements How to InstallOutside Locating Unit in WindowAttach L Bracket Secure the Guide Panels Install the Sash Seal and Sash LockFunction of Controls Precaution The Remote Control unit will notOperation Mechanical Parts DisassemblyFront Grille CabinetAir Guide and Turbo Fan Air Handling PartsFAN ShroudOverload Protector Electrical PartsCompressor CapacitorMotor Power CordCapillary Tube Refrigerating CycleEvaporator Disassembly Pulling Vacuum Electronic Control SchematicDescription QTY Remarks Wiring DiagramComponents Location Main P.C.B AssemblyPiping System Troubleshooting GuideIneffective Cooling Troubleshooting GuideUnit runs but poor cooling Fails to Start Possible Trouble Electrical Parts Troubleshooting GuideCompressor does not operate Possible Trouble Function of Energy Saver does not operate Possible Trouble FAN does not operatePossible Trouble Remote controller does not operate Is the reset circuit OK? Select the desired Temp. to lower Number CN-AC/DC OK? YES Connect connector Complaint Cause Remedy Troubleshooting Guide Exploded View Replacement Parts List Description Remark Replacement Parts ListCL8000ER L1004R M1004RM8004RY4 L8004RY4 NO3828A20472A February