LG MULTI V IV ARNU12GTU 2 Series User Manual

Troubleshooting Guide
- 101 -
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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n Error diagnosis and countermeasure flow chart
No
Yes
Is the resistance of discharge
temperature sensor normal?*
Replace discharge
temperature sensor
Is the amount of
refrigerant normal?
[refer refrigerant part]
Weld / reconnect the cracked
portion and recharge refrigerant
Is there pipe crack
or trace of leakage?
Change the amount of
refrigerant
(Charge additive amount)
Is EEV in
outdoor unit normal
at heating operation?
[refer electric
component part]
Replace outdoor unit EEV
Does liquid injection
corresponded
operate normally?
Check liquid injection
corresponded
Is there pipe
(strainer etc.) clogging?
Check another components
and operation conditions
/ Take measures
Replace strainer
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
* Resistance value of discharge temperature sensor
10C = 362k, 25C= 200k, 50C= 82k, 100C= 18.5k
Error No. Error Type Error Point Main Reasons
32*
Master 321
Slave1 322
Slave2 323
Slave3 324
Over-increase discharge
temperature of inverter com-
pressor 1 at main outdoor unit
Compressor is off because
of over-increase discharge
temperature of inverter
compressor 1
1. Temperature sensor defect of inverter com-
pressor 1 discharge pipe
2. Refrigerant shortage / leak
3. EEV defect
4. Liquid injection valve defect
33*
Master 331
Slave1 332
Slave2 333
Slave3 334
Over-increase discharge
temperature of inverter com-
pressor 2 at main outdoor unit
Compressor is off because
of over-increase discharge
temperature of inverter
compressor 2
1. Temperature sensor defect of inverter com-
pressor 2 discharge pipe
2. Refrigerant shortage / leak
3. EEV defect
4. Liquid injection valve defect

LG MULTI V IV ARNU12GTU 2 Series Specifications

General

Brand	LG
Model	MULTI V IV ARNU12GTU 2 Series
Category	Air Conditioner
Language	English