Troubleshooting - Danfoss VLT 3500 Series Instruction Manual

Troubleshooting

The Troubleshooting Flowcharts on the next pages are based on the most common problems.
1)
Symptom
Motor runs unevenly
3)
Symptom
Motor does not run
106
2)
If the motor runs unevenly,
but no fault is indicated,
the cause can be incorrect
setting of the VLT drive.
Adjust the setting.
If the new setting cannot
make the motor run
evenly, contact Danfoss.
4)
Is there backlight in the
display?
No Yes
5)
Is the unit connected to the
AC line?
Yes
See: 7)
VLT ® Series 3500
6)
Are fault messages
displayed?
No Yes
See the fault
See: 13)
messages
section of
this manual.