LG Multi-Inverter Service Manual page 79

4. Trouble Shooting
Display
Title
code
DC Link Low voltage
23
I Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal ?
Yes
Is Inverter PCB assembly
Power connection normal?
Yes
Is Inverter PCB Normal?
Yes
Recheck power and installation
condition
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Only for training and service purposes
Cause of error
• DC Link volt is below
140Vdc
No
Check L~N Voltage is 220V±15%
No
Check connection from terminal block to
Inverter PCB assembly CN(L), CN(N)
No
Replace inverter PCB assembly
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Check point & Normal condition
• Check point & Normal condition
• Check theCN_(L),CN_(N) Connection.
• At not operating : DC Link voltage(280V¡è )
• At Comp operating : DC Link voltage(340V¡è )
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