Elevator Drive User Manual

Chapter 5 Troubleshooting|
Revision Nov. 2008, VLE1, SW V1.03 5-7
5.10 Motor Speed cannot be Changed
Motor can run but
cannot change speed
Ye s
Yes
Ye s
Ye s
Yes
Ye s
Yes
Ye s
No
No
No
No
No
No
No
No
No
Check if the setting of the
max. frequency is too low
If the setting of frequency
is out of range(upper/lower)
bound
Modify the setting
Modify the setting
Yes
If the setting of
Pr.04-00 to Pr.04-14
are the same
Press UP/DOWN key
to see if speed has
any change
If there is any change
of the signal that sets
frequency (-10V-10V
and 4-20mA)
Check if the wiring between
MI1~MI8 to COM is correct
Connect
correctly
Check if frequency for
each step is different
Check if the wiring of
external terminal is correct
Change frequency setting
If accel./decel. time
is very long
Please set suitable
accel./decel. time by
load inertia
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact DELTA.
Change defective
potentiometer
No