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Part 4 Trouble Shooting
6.6 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IGBTM Fault)
■ Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Recheck power and installation condition
Yes
Check
R~S/S~T/T~R phase voltage is 380V 10%
R~N/S~N/T~N phase voltage is 220V 10%
→ Check connection condition and wiring if power is
abnormal
Are there any power wire
connections normal?
No
Yes
1. Check R/S/T/N wiring conditions
→ Rewire them if abnormality found.
Is Inv. PCB
normal?
No
Check Inv. PCB IGBTM normality.
→ Check Inv. PCB IGBTM normality. (Refer to P.53)
→ Replace Comp PCB assembly if abnormality found.
Is bridge diode normal?
No
1. Check joining condition of bridge diode and heatsink
2. Check bridge diode
→ joining again or replacing bridge diode
if abnormality found
Yes
Yes
Is Inv. PCB
bridge diode joining condition normal?
No
Check joining condition of Inv. PCB and bridge diode
→ joining again if abnormality found
Yes
Is DC_Link Wire connection
condition normal?
No
1.Check Inv. PCB P,N connector
connection condition
2.Check Inv. PCB P,N connector
connection condition
3. Check wire disconnection and wiring
→ Reassemble if abnormality found
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