LG Multi V - Page 84

Troubleshooting Guide
- 84 -
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Only for training and service purposes
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■ Error diagnosis and countermeasure flow chart
1. Temperature sensor defect of inverter com-
pressor discharge pipe
2. Refrigerant shortage / leak
3. EEV defect
4. Liquid injection valve defect
Error
No.
Error Type Error Point Main Reasons
Compressor is off
because of over-increase
discharge temperature of
inverter compressor
Over-increase discharge
temperature of inverter com-
pressor at main outdoor unit
32
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
10°C(50°F) = 362kΩ, 25°C(77°F)= 200kΩ,
50°C(122°F) = 82kΩ, 100°C(212°F)= 18.5kΩ