LG ARUV Series Service Manual page 256

Troubleshooting Guide
Error
Error Type
No.
DC voltage charging for
23
inverter compressor driving
defect
Error diagnosis and countermeasure flow chart
Is noise filter and
fuse normal?
[refer electric
component part]
Yes
Is capacitor normal?
[refer electric
component part]
Yes
Is the voltage of 3 phase
diode more than maximum
270V?*
Yes
Check whether all the
connections and terminals
is normal and reconnect
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Error Point
Problem in DC charging volt-
age after starting relay
turned on
No
Replace Noise Filter or Fuse
No
Replace Capacitor
No
Replace outdoor unit inverter PCB
* After indoor unit turned on and the compressor is not operated,
just before magnetic switch is turned on
the voltage between the 2 terminal as below is more than 270V
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Main Reasons
1. Looseness of DC link terminal
2. Damage in starting relay
3. Capacitor damage
4. Defective sensing circuit of the inverter PCB
LGE Internal Use Only