LG FM21AH UE3 - Page 92

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