LG Multi V Manual&Nbsp;

Troubleshooting Guide
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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
* If there is no remote controller to replace : Use another unit’s remote controller doing well
** Check cable : Contact failure of connected portion or extension of cable are main cause
Check any surrounded noise ( check the distance with main power cable)
➔ make safe distance from the devices generate electromagnetic wave
*** After replacing indoor unit PCB, do Auto Addressing & input unit’s address if connected to central controller.
(All the indoor units connected should be turned on before Auto Addressing
03 No transmission between cabled
remote controller & indoor unit
Error
No.
Error Type Error Point Main Reasons
The remote controller
did not receive the sig-
nal from indoor unit
during specific time
1. Remote controller fault
2. Indoor unit PCB fault
3. Connector fault, Wrong connection
4. transmission cable problem
■ Error diagnosis and countermeasure flow chart
CN-REMO
: Remote controller connection
❇ The PCB can differ from model to model.
Check from the right source.
Checking transmission cable connection status
Does the error happens
again if the remote
controller is replaced?*
Does the error occurred
when the cable of remote
controller is replaced?
Replace cabled remote
controller
Check connection &
transmission cable **
Replace indoor unit PCB ***
Yes
Yes
No
No

LG Multi V Specifications

General

Type	VRF (Variable Refrigerant Flow)
Compressor Type	Scroll
Refrigerant	R410A
Energy Efficiency	High
Control System	Centralized and individual control options
Indoor Units	Multiple types available (e.g., ceiling cassette, wall-mounted, ducted)