LG ARUN Series Service Manual page 90

Troubleshooting Guide
Error
Error Type
No.
23*
Inverter Compressor DC
Master
Link Low Voltage
231
Slave
232
I Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
Yes
Is inverter PCB assembly
power connection normal?
Yes
Is inverter PCB assembly normal?
Yes
Recheck power and installation condition
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Only for training and service purposes
Error Point
DC Voltage isn't charged
after starting relay on
Check
R~S/S~T/T~R Phase voltage : 460V±10% (3Ø 460V)
No
¡ Check connection condition and wiring if power is
abnormal
Check connection between inverter PCB assembly and
No
bridge diode(misconnection, disconnection)
¡ wiring again if abnormality found
Check inverter PCB assembly IPM normality
No
¡ Replace inverter PCB assembly
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Main Reasons
1. DC Link terminal misconnection/terminal
contact fault
2. Starting relay damage
3. Condenser damage
4. Inverter PCB assembly damage
(DC Link voltage sensing part)
5. Input voltage low
208/230V±10% (3Ø 208/230V)
LGE Internal Use Only