LG MULTI V Service Manual page 119

Error
Error Type
No.
Inverter compressor over
29
current
n Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal?
Yes
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
Yes
Is compressor
Wire connection
condition normal?
Yes
Is input voltage normal?
Yes
Is Inv. PCB normal?
Yes
Recheck power and installation condition
Error Point
Inverter compressor input
current is over 46 A
1. Check Pipe clogging/distortion
2. Check Covering (Indoor/Outdoor Unit)
No
3. Check EEV connector assemble
condition/normal operation
4. Check refrigerant pressure
→ Reassemble or manage if abnormality found
1. Check resistance between each terminal of
compressor (Refer to the right side tables.)
No
2. Check insulation resistance between compressor
terminal and pipe (over 50 m)
→ Replace compressor if abnormality found
1. Check Inv. PCB U,V,W connector
connection condition
No
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→ Reassemble if abnormality found
Check
L1(L) – L2(N) phase voltage is 220 V(±10 %) or
No
240 V(±10 %)
→ Check connection condition and wiring if power
is abnormal
No Check Inv. PCB IPM normality
→ Replace Inv. PCB
- 119 -
Self-diagnosis function
Main Reasons
1. Overload operation
(Pipe clogging/Covering/EEV defect/Ref.
overcharge)
2. Compressor damage(Insulation
damage/Motor damage)
3. Input voltage low
4. Inv. PCB damage
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