5-9 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Is MCCB 
applied? 
Can MCCB be 
applied? 
 
Are voltages 
between power 
terminals correct? 
Is LED lit? 
 
Are there outputs between the 
U-V-W  terminals of the motor? 
 
Are outputs between U-
V-W even 
Short circuited wiring 
․The power is abnormal 
․Incorrect wiring 
E310fault 
The operation switch is set to 
“RUN’ position 
E310fault 
E310fault 
YES (within ±3% of the normal value) 
YES (voltage deviation between output pairs are even if 
within ±3% of the normal value without the motor 
․Motor 
․Motor faults 
․Incorrect  wiring 
YES 
YES 
O 
O 
 
O 
Is the operation switch 
in “RUN’ ? 
O 
O 
O 
O 
The motor can not run 
z  Figure 5-4  Motor RUN failure Flow chart