LG ARUN Series Service Manual page 99

Error
Error Type
No.
32* Over-increase discharge
Master 321 temperature of inverter com-
Slave 322 pressor at main outdoor unit
Over-increase discharge
33*
temperature of constant
compressor at main con-
Master 331
stant outdoor and sub con-
Slave 332
stant outdoor unit
I Error diagnosis and countermeasure flow chart
Is the amount of
refrigerant normal?
[refer refrigerant part]
Yes
Is the resistance of discharge
temperature sensor normal?*
Yes
Is EEV in
outdoor unit normal
at heating operation?
[refer electric
component part]
Yes
Does liquid injection
corresponded
operate normally?
Yes
Is there pipe
(strainer etc.) clogging?
Yes
Replace strainer
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Error Point
Compressor is off
because of over-increase
discharge temperature of
inverter compressor
Compressor is off
because of over-increase
discharge temperature of
constant compressor at
main and sub outdoor unit
No
Is there pipe crack
or trace of leakage?
Yes
Weld / reconnect the cracked
portion and recharge refrigerant
No
Replace discharge
temperature sensor
* Resistance value of discharge temperature sensor
10°C(50°F) = 362kΩ, 25°C(76°F)= 200kΩ, 50°C(122°F)= 82kΩ,
100°C(212°C)= 18.5kΩ
No
Replace outdoor unit EEV
No
Check liquid injection
corresponded
Check another components
No
and operation conditions
/ Take measures
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Troubleshooting Guide
Main Reasons
1. Temperature sensor defect of inverter com-
pressor discharge pipe
2. Refrigerant shortage / leak
3. EEV defect
4. Liquid injection valve defect
1. Temperature sensor defect of constant
compressor discharge pipe?
2. Refrigerant shortage/leak
3. EEV defect
4. Liquid injection valve defect
Change the amount of
No
refrigerant
(Charge additive amount)
LGE Internal Use Only