Download Manual - InduProgress

Chapter 5 Troubleshooting|VFD-M-D Series
5.10 Motor Speed cannot be Changed
Motor can run but
cannot change speed
Modify the setting
Check if the setting of the
max. frequency is too low
Yes
Yes
No
If the setting of
Pr.05-17toPr.05-31
Yes is too high
Check to see if frequency is
Yes
out of range (upper/lower)
boundaries
No
Yes
If finished with
executing
Pr.05-15
No
Yes
Is it in PLC mode
Press UP/DOWN key
Yes
to see if speed has
any change
No
No
Yes
If there is any change
of the signal that sets Yes
frequency (0-10V and
4-20mA)
If the setting of
Pr.05-00 to Pr.05-14
are the same
No
Modify the setting
Check if the wiring between
M1~M6 to DCM is correct
Yes
Check if frequency for
each step is different
No
No
No Check if the wiring of
external terminal is correct
Correct
wiring
No
Yes
Change defective
potentiometer
Yes
Change frequencysetting
No Check if accel./decel.
time is set correctly
Yes
Please set suitable
accel./decel. time by
load inertia
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact DELTA.
Revision May 2009, MDE5, SW V1.1
5-7