Troubleshooting Guide
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23
Inverter Compressor DC
Link Low Voltage
Error
No.
Error Type Error Point Main Reasons
DC Voltage isn't charged
after starting relay on
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
■ Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Yes
Yes
Recheck power and installation condition
Check
L1, L2 phase is 208/230V ±10%
→ Check connection condition and wiring if power is
abnormal
Is inverter PCB assembly
power connection normal?
No
Check connection from terminal block to inverter PCB
assembly CN(L1),CN(L2)
→ wiring again if abnormality found
Is inverter PCB assembly normal?
No
Check inverter PCB assembly IPM normality
→ Replace inverter PCB assembly
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