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Chapter 7 Troubleshooting |VFD-S Series
7-6 Revision August 2006, SE08, SW V2.61
7.9 Motor cannot Run
Motor cannot run
Check PU01
for normal
display
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Check if non-fuse
breaker and magnetic
contactor are ON
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Set them to ON
Reset after clearing
fault and then RUN
Check if there is any
fault code displayed
Check if input
voltage is normal
Check if any faults
occur, such as
Lv, PHL or
disconnection
Input "RUN"
command
by keypad
It can run when
no faults occur
If jumper or DC
reactor is connected
between +1 and +2/B1
Use jumper
or DC reactor
Press RUN key to
check if it can run
Maybe AC motor drive has malfunction or misoperation
due to noise. Please contact DELTA.
Press UP key to
set frequency
Yes
Modify frequency
setting
Check if input FWD
or REV command
Check if the wiring
of terminal FWD
and between
REV-DCM is correct
Yes
Change switch or relay
Set frequency or not
Press UP to
check if motor
can run
Correct connection
Check if the parameter
setting and wiring of
analog signal and
multi-step speed
are correct
No
Motor has malfunction
No
Maybe AC motor drive has malfunction.
Please contact DELTA.
Check if there is any
output voltage from
terminals U, V and W
Check if motor
connection
is correct
No
Connect correctly
Check if the setting
of torque
compensation
is correct
Increase the setting of
torque compensation
Motor is locked due to large load, please reduce load.
For example, if there is a brake, check if it is released.
If load is too large
if upper bound freq.
and setting freq. is
lower than the min.
output freq.
Yes
Change defective
potentiometer and
relay
Yes