Ground Fault; Over Voltage (Ov) - Delta VFD-VL Series User Manual

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Chapter 5 Troubleshooting|

5.2 Ground Fault

GFF
Ground fault

5.3 Over Voltage (OV)

Reduce voltage to
be within spec.
Maybe AC motor drive
has malfunction or
misoperation due to
noise. Please contact
with DELTA.
Reduce moment
of inertia
Call 1(800)985-6929 for Sales
deltaacdrives.com
VFD-VL
If output circuit(cable or
motor) of AC motor drive
is grounded?
Yes
Remove grounding
Over voltage
No
If voltage is within
specification
If over-voltage is occurred without load
When OV occurs, check if the
No
voltage of DC BUS is greater
than protection value
Yes
If OV occurs when
No
sudden acceleration
stops
Yes
Increase
acceleration
time
No
No
Reduce moment of load inertia
Use braking unit or DC braking
Need to check control method. Please contact DELTA.
deltaacdrives.com
sales@deltaacdrives.com
Maybe AC motor drive has
No
malfunction or misoperation
due to noise. Please
contact DELTA.
Yes
Yes
No
Yes
Increase
Yes
deceleration
time
No
Yes
Increase setting time
No
Yes
5-2
sales@deltaacdrives.com
Need to considerate to
use braking unit and
DC braking
No