Revision July 2009, SW V1.1
6-1
Chapter 6 Troubleshooting
6.1 Over Current (OC)
ocA
ocd
OC
Ov er-c urrent
during acceleration
Ov er-c urrent
during dec eleration
Ov er c urrent
Check if there i s any
betw een the U, V, W and motor
short circ uits and
grounding
Yes
N o
N o
No
No
No
No
Yes
Yes
Yes
R emove s hor t cir cuit
or ground fault
Reduc e the load or
incr eas e the power
of AC motor dr ive
No
N o
R educ e torque
compensation
R educ e torque
compensation
Suitable torque
compensation
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Maybe AC motor drive
has malfunc ti on or error
due to nois e. Please
contact D ELTA.
Can acc el er ation
time be made longer?
Can deceleration
time be made longer?
R educ e load or inc rease
the power of AC motor
driv e
Check braking
method. Please
contact DELTA
R educ e load or inc rease
the power of AC motor
driv e
H as l oad changed
suddenly?
Check if
acceler ati on time
is too short by
load iner ti a.
Check if
deceleration time
is too short by
load iner ti a.
Increase accel/decel
time
Check if load i s too lar ge
Summary of Contents for VFD-L-I Series
Page 1: ...PLC1 ir...
Page 2: ......
Page 3: ......
