Over Current (Oc); Chapter 5 Troubleshooting - Delta Electronics AC Motor Drive VFD-VE Series User Manual

5.1 Over Current (OC)

Remove short circuit
or ground fault
Reduce the load or
increase the power
of AC motor drive
No Reduce torque
compensation
Yes
Reduce torque
compensation
Maybe AC motor drive
has malfunction or error
due to noise. Please
contact DELTA.
Increase accel/decel
time
Revision August 2008, 03VE, SW V2.04
ocA
Over-current
during acceleration
Yes
No
Yes
No
No
Suitable torque
compensation
Yes
Check if
No
acceleration time
is too short by
load inertia.
Yes
Yes
Can acceleration
time be made longer?
No
Reduce load or increase
the power of AC motor
drive

Chapter 5 Troubleshooting

ocd
Over-current
during acceleration
Check if there is any short circuits and
grounding between the U, V, W and motor
No
If load is too large
No
Check if
No
deceleration time
is too short by
load inertia.
Yes
Yes
Can deceleration
time be made longer?
No
Check braking
method. Please
contact DELTA
OC
Over current
No
No
Is load changed
No
suddenly?
Yes
Reduce load or increase
the power of AC motor
drive
5-1