LG Multi V Service Manual

HR Unit PCB
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Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Completion of auto pipe detection
Are the number
of indoor units connected to the
outdoor unit wiring and displayed
one equal?
Reset the power of HR unit PCB
Confirm that the setting of No.2, 3, 4 of
SW02E corresponds with the number of
indoor units.
Master unit PCB DIP switch on : No.5
Select the mode using ‘ȯ’, ‘ȭ’ Button :
“Idu” Push the ‘Ɨ’ button
Select the mode using ‘ȯ’, ‘ȭ’ Button :
“Idu” Push the ‘Ɨ’ button
Select the “Id 6” function using ‘ȯ’, ‘ȭ’
Button :“StA” Push the ‘Ɨ’ button
Select the “Id 5” function using ‘ȯ’, ‘ȭ’ Button :“Ath”,
“Atc”.
Outdoor temperature is over 15°C(59°F) : “Ath” Using
Outdoor temperature is below 15°C(59°F) : “Atc” Using
88' is displayed on 7-SEG of the outdoor
unit main PCB
Outdoor unit is operated for 5~60 minues.
The number of indoor units detected is
displayed for 30 seconds on the outdoor
unit PCB after outdoor unit stopped
Display error on outdoor unit PCB
Display error on HR unit PCB
Outdoor unit PCB : HR ⇒ HR unit
number
⇒ Valve number
HR unit : '200'
Check the HR unit and indoor unit
Pipe detection error occur after 30
seconds.
Check the installation of pipe of
outdoor, indoor, HR unit
Incompletion of auto pipe detection
Retry auto pipe detection after
checking trouble
Is the pipe
setting condition
satisfied during the operation of
indoor unit?
Confirmation of indoor unit address setting
Turn No.1 of SW02E of HR unit PCB off.
NO
NO
YES
YES
2) Flow chart of auto addressing for pipe detection
※It is possible to be generated mode changing noise of heating and cooling which is normal. There is no mode
changing noise at normal operation.

LG Multi V Specifications

General

Brand	LG
Model	Multi V
Category	Air Conditioner
Language	English