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5.1 Over Current (OC)
Remove s hor t cir cuit
or ground fault
Reduc e the load or
incr eas e the power
of brus hless DC
motor dr ive
No Reduc e torque
compensation
R educ e torque
compensation
Maybe br ushless DC motor
driv e has malfunc ti on or error
due to nois e. Please
contact DELT A.
Revision May 2009, 06EE, V0.50
Yes
Yes
Yes
R educ e load or inc rease
the power of AC motor
driv e
Chapter 5 Troubleshooting
oc
Ov er-c ur rent
during constant speed
Check if there is any
short circ ui ts and
grounding
between the U , V, W and motor
No
C heck if load is too lar ge
No
Has l oad changed
No
suddenly?
Yes
Reduc e load or inc rease
the power of br ushless
DC motor drive
5-1
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