4. Trouble Shooting
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23
DC Link Low voltage
• DC Link volt is below
300V
• Check point & Normal condition
• Check the TAB1 is connect.
• At not operating : DC Link voltage(260V
↑
)
• At Comp operating : DC Link voltage(500V
↑
)
Display
code
Title
Cause of error
Check point & Normal condition
■
Error Diagnosis and Countermeasure Flow Chart
Is DC Link voltage
under 380V ?
No
Yes
Yes
Yes
Recheck power and installation condition
Yes
Check the DC link Voltage AD Input of Inverter PCB
If AD Input is strange, change the Inverter PCB
(refer the next page.)
Is Inverter PCB Normal?
No
Check connection from terminal block to
Inverter PCB assembly CN_L1(R), CN_L2(S), CN_L3(T)
Replace inverter PCB assembly
Is input voltage normal ?
No
R~S/S~T/T~R phase voltage is 400V
±
10%
R~N/S~N/T~N phase voltage is 220V
±
10%
→
Check connection condition and wiring if power is
abnormal.
Is Inverter PCB assembly
Power connection normal?
No
Summary of Contents for Multi-Inverter Type
Page 123: ...P NO MFL36552501 APRIL 2008 ...
