LG Therma V AHBW A0 Series - Page 62

Trouble Shooting Guide
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29
Inverter compressor over
current
Inverter compressor input
current is over 24A
1. Overload operation
(Pipe clogging / Covering / EEV defect / Ref.
overcharge)
2. Compressor damage (Insulation damage/Motor
damage)
3. Input voltage low
4. Inverter PCB assembly damage
Display
code
Title Cause of error Check point & Normal condition
Is installation
condition normal?
No
Yes
Yes
Yes
Recheck power and installation condition
1. Check Pipe clogging/distortion
2. Check Covering
3. Check EEV connector assemble condition/normal
operation
4. Check refrigerant pressure
’ Reassemble or manage if abnormality found
Yes
Is input voltage normal?
No
Check
U-V,V-W,W-U phase is 220~240 V ±10%
’ Check connection condition and wiring if power is
abnormal
Yes
Is inverter PCB assembly
normal?
No
Check inverter PCB assembly IPM normality
’ Replace inverter PCB assembly
Are the resistance
between each phase and
insulation resistance of Inverter
compressor normal?
No
1. Check resistance between each terminal of compressor
(0.188 ±7%)
2. Check insulation resistance between compressor
terminal and pipe (over 50 MΩ)
’ Replace compressor if abnormality found
Is compressor
wire connection
condition normal?
No
1. Check inverter PCB assembly U,V,W connector
connection condition
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
’ Reassemble if abnormality found
Check Flow Chart