LG Therma V AHBW Series - Page 92

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AC input instant over
current error
(Matter of software)
PCB(Inverter) input
power current is over
48A(peak) for 2ms
1. Overload operation (Pipe clogging/Covering/EEV
defect/Ref.overcharge)
2. Compressor damage
(Insulation damage/Motor damage)
3. Input voltage abnormal (L, N)
4. Power line assemble condition abnormal
5. PCB assembly 1 damage
(input current sensing part)
Display
code
Title Cause of error Check point & Normal condition
n Error Diagnosis and Countermeasure Flow Chart
No
1.Check Pipe clogging/distortion
2.Check Covering (Unit)
3.Check EEV connector assemble condition/normal operation
4.Check refrigerant pressure
→ Reassemble or manage if abnormality found
Is installation
condition normal?
Is compressor
Wire connection
condition normal?
1.Check PCB assembly 1 U,V,W connector connection condition
2.Check wire disconnection and wiring
3.Check compressor terminal connection condition(bad contact)
→ Reassemble if abnormality found
Is AC input Wire connection
condition normal?
1.Check R,S,T connection condition
2.Check wire disconnection and wiring
→ Reassemble if abnormality found
PCB assembly 1
normal?
Yes
No
Recheck power and
installation condition
Yes
Yes
Yes
No
No
Yes
No
Check
R-S, S-T, T-R phase voltage is 220~240 V ± 10%
→ Check connection condition and wiring if power is abnormal
Is input voltage normal?
Check PCB assembly 1 IPM normality
→ Replace PCB assembly 1