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LG MULTI V IV ARNU12GTU 2 Series User Manual

LG MULTI V IV ARNU12GTU 2 Series
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Troubleshooting Guide
- 95 -
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
25*
Master
251
Slave1
252
Slave2
253
Slave3
254
Input Voltage high/low
Error
No.
Error Type Error Point Main Reasons
Input voltage is over limited
value of the product (173V
or less, 289V or more)
1. Input voltage abnormal (R-N)
2. Outdoor unit Converter PCB assembly
damage (input voltage sensing part)
3. N phase line disconnection
n Error Diagnosis and Countermeasure Flow Chart
Yes
Yes
Recheck power and installation condition
Yes
Are there any power wire
connections normal?
No
Yes
1. Check R/S/T/N wiring conditions
Rewire them if abnormality found.
Is input voltage normal?
No
Check
R~S/S~T/T~R phase voltage is 380V 10%
R~N/S~N/T~N phase voltage is 220V 10%
Check connection condition and wiring if power is
abnormal
Is converter PCB assembly
bridge diode joining condition normal?
No
Check joining condition of converter PCB assembly and
bridge diode
joining again if abnormality found
Yes
Is DC_Link Wire connection
condition normal?
No
1.Check Comp PCB assembly P,N connector
connection condition
2.Check Converter PCB assembly P,N connector
connection condition
3. Check wire disconnection and wiring
Reassemble if abnormality found
Comp PCB LED display error
No
Replace Comp PCB assembly.

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LG MULTI V IV ARNU12GTU 2 Series Specifications

General IconGeneral
BrandLG
ModelMULTI V IV ARNU12GTU 2 Series
CategoryAir Conditioner
LanguageEnglish

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