Danfoss vlt FC 102 Instruction Manual

Symptom Possible cause Test Solution
Adjustable
frequency
drive
deceleration
problems
Motor data are entered
incorrectly
If warnings or alarms occur, see 7.3 List of
Warnings and Alarms.
Check that motor data are entered correctly
Increase the ramp-down time in 3-42 Ramp
1 Ramp-down Time. Enable overvoltage
control in 2-17 Over-voltage Control.
Acoustic noise
or vibration
(e.g., a fan
blade is
making noise
or vibrations
at certain
frequencies)
Resonances, e.g., in the
motor/fan system
Bypass critical frequencies by using
parameters in parameter group 4-6* Speed
Bypass
Check if noise and/or vibration have been
reduced to an acceptable limit.
Turn off overmodulation in 14-03 Overmodu-
lation
Change switching pattern and frequency in
parameter group 14-0* Inverter Switching
Increase Resonance Dampening in
1-64 Resonance Dampening
Table 7.7 Troubleshooting
Diagnostics and Troubleshoo...
VLT
®
HVAC Drive Instruction Manual
MG11AJ22 - Rev. 2013-09-13 51
7 7

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English