Motor Speed Cannot Be Changed - Delta VFD-B User Manual

7.10 Motor Speed cannot be Changed

Modify the setting
If the setting of
Pr.05-17toPr.05-31
is too high
Yes
If finished with
Yes
executing
Pr.05-15
If the setting of
Yes
Pr.05-00 to Pr.05-14
are the same
Revision July 2008, BE16, SW V4.08 & V5.00
Motor can run but
cannot change speed
Check if the setting of the
Yes
max. frequency is too low
Yes
Check to see if frequency is
out of range (upper/lower)
boundaries
No
Is it in PLC mode
Yes
No
No
Check if the wiring between
M1~M6 to DCM is correct
Check if frequency for
each step is different
No
Check if accel./decel.
time is set correctly
Please set suitable
accel./decel. time by
load inertia
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact DELTA.
Chapter 7 Troubleshooting |VFD-B Series
No
Yes
No
No
No
Yes
Correct
wiring
No
Yes
Change frequencysetting
Yes
Modify the setting
Press UP/DOWN key
to see if speed has
any change
If there is any change
of the signal that sets
frequency (0-10V and
4-20mA)
No
Check if the wiring of
No
external terminal is correct
Yes
Change defective
potentiometer
Yes
Yes
7-7