Danfoss vlt FC 102 User Guide

Symptom Possible cause Test Solution
Drive system
has
acceleration
problems
Motor data are entered
incorrectly.
If warnings or alarms occur, see chapter 6.5 List of
Warnings and Alarms.
Check that motor data are entered correctly.
Increase the ramp-up time in
parameter 3-41 Ramp 1 Ramp Up
Time. Increase the current limit in
parameter 4-18 Current Limit.
Increase the torque limit in
parameter 4-16 Torque Limit Motor
Mode.
Drive system
has
deceleration
problems
Motor data are entered
incorrectly.
If warnings or alarms occur, see chapter 6.5 List of
Warnings and Alarms.
Check that motor data are entered correctly.
Increase the ramp-down time in
parameter 3-42 Ramp 1 Ramp
Down Time. Enable overvoltage
control in parameter 2-17 Over-
voltage Control.
Acoustic noise
or vibration
(for example,
a fan blade is
making noise
or vibrations
at certain
frequencies)
Excessive resonances, for
example, in the motor/fan
system.
Bypass critical frequencies, using parameters in the
parameter group 4-6* Speed Bypass.
Check if noise and vibration have
been reduced to an acceptable
level.
Turn o overmodulation in parameter 14-03 Overmo-
dulation.
Change the switching pattern and frequency in the
parameter group 14-0* Inverter Switching.
Increase resonance damping in
parameter 1-64 Resonance Dampening.
Table 6.8 Troubleshooting
Maintenance, Diagnostics, a...
VLT
®
Parallel Drive Modules
50 Danfoss A/S © 08/2017 All rights reserved. MG37L202
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Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English