LG MULTI V 5 Manual Book page 53

* Measuring resistance between each
terminal of compressor
* Measuring input voltage
N
R(L1) S(L2) T(L3)
* Compressor wire connection
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Only for training and service purposes
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Error No. Error Type Error Point
Error No. Error Type Error Point
32*
Over-increase dis- Compressor is off be-
Compressor is off because
Master 321 Over-increase discharge
charge temperature of cause of over-increase
of over-increase discharge
32*
Slave1 322 temperature of inverter com-
inverter compressor 1 discharge temperature of
temperature of inverter
Slave2 323 pressor 1 at main outdoor unit
at main outdoor unit compressor 1 inverter compressor 1
Slave3 324
33*
Compressor is off because
Over-increase dis- Compressor is off be-
Master 331 Over-increase discharge
of over-increase discharge
Slave1 332 temperature of inverter com- charge temperature of cause of over-increase
33* temperature of inverter
Slave2 333 pressor 2 at main outdoor unit
inverter compressor 2 discharge temperature of
compressor 2
Slave3 334
at main outdoor unit inverter compressor 2
n Error diagnosis and countermeasure flow chart
Is the amount of
No
Is there pipe crack
refrigerant normal?
or trace of leakage?
[refer refrigerant part]
Yes Yes
Weld / reconnect the cracked
portion and recharge refrigerant
No
Is the resistance of discharge Replace discharge
temperature sensor normal?* temperature sensor
* Resistance value of discharge temperature sensor
Yes
10°C = 362kΩ, 25°C= 200kΩ, 50°C= 82kΩ, 100°C= 18.5kΩ
Is EEV in
outdoor unit normal
No
at heating operation?
Replace outdoor unit EEV
[refer electric
component part]
Yes
Check another components
No
Is there pipe
and operation conditions
(strainer etc.) clogging?
/ Take measures
Yes
Replace strainer
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main Reasons
Main Reasons
1. Temperature sensor defect of in-
1. Temperature sensor defect of inverter com-
verter compressor 1 discharge pipe
pressor 1 discharge pipe
2. Refrigerant shortage / leak
2. Refrigerant shortage / leak
3. EEV defect
3. EEV defect
4. Liquid injection valve defect 4. Liquid injection valve defect
1. Temperature sensor defect of inverter com-
1. Temperature sensor defect of in-
pressor 2 discharge pipe
verter compressor 2 discharge pipe
2. Refrigerant shortage / leak
2. Refrigerant shortage / leak
3. EEV defect
3. EEV defect
4. Liquid injection valve defect
4. Liquid injection valve defect
Change the amount of
No
refrigerant
(Charge additive amount)
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