LG MULTI V Service Manual page 121

Error
Error Type
No.
Over-increase discharge
32 temperature of inverter com-
pressor 1 at main outdoor unit
n 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
Error Point
Compressor is off because
of over-increase discharge
temperature of inverter
compressor 1
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) = 362 k, 25 °C(77 °F) = 200 k, 50 °C(122 °F) = 82k,
100 °C(212 °F)= 18.5 k
No
Replace outdoor unit EEV
No
Check liquid injection
corresponded
Check another components
No
and operation conditions
/ Take measures
- 121 -
Self-diagnosis function
Main Reasons
1. Temperature sensor defect of inverter com-
pressor 1 discharge pipe
2. Refrigerant shortage / leak
3. EEV defect
4. Liquid injection valve defect
Change the amount of
No
refrigerant
(Charge additive amount)
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