If acceleration problems were encountered
•
If warnings or alarms occur, see
.
•
Check that motor data is entered correctly.
•
Increase the ramp-up time in
3-41 Ramp 1 Ramp
Up Time
.
•
Increase current limit in
4-18 Current Limit
.
•
Increase torque limit in
4-16 Torque Limit Motor
Mode
.
If deceleration problems were encountered
•
If warnings or alarms occur, see
.
•
Check that motor data is entered correctly.
•
Increase the ramp-down time in
3-42 Ramp 1
Ramp Down Time
.
•
Enable overvoltage control in
2-17 Over-voltage
Control
.
NOTE
The OVC algorithm does not work when using PM motors.
See
8.4 Warning and Alarm Definitions
for resetting the
frequency converter after a trip.
NOTE
through
in this chapter
concludes the procedures for applying power to the
frequency converter, basic programming, set-up, and
functional testing.
3.8 System Start Up
The procedure in this section requires user-wiring and
application programming to be completed.
is intended to help with this task. Other
aids to application set-up are listed in
. The following procedure is recommended after
application set-up by the user is completed.
CAUTION
MOTOR START!
Ensure that the motor, system, and any attached
equipment is ready for start. It is the responsibility of the
user to ensure safe operation under any condition. Failure
to do so could result in personal injury or equipment
damage.
1.
Press [Auto On].
2.
Ensure that external control functions are
properly wired to the frequency converter and all
programming is completed.
3.
Apply an external run command.
4.
Adjust the speed reference throughout the speed
range.
5.
Remove the external run command.
6.
Note any problems.
If warnings or alarms occur, see
3.9 Acoustic Noise or Vibration
If the motor or the equipment driven by the motor - e.g. a
fan blade - is making noise or vibrations at certain
frequencies, try the following:
•
Speed Bypass, parameter group 4-6*
•
Over-modulation,
14-03 Overmodulation
set to off
•
Switching pattern and switching frequency
parameter group 14-0*
•
Resonance Dampening,
1-64 Resonance
Dampening
Start Up and Functional Tes...
VLT
®
HVAC Drive Operating Instructions
MG11AH02 - VLT
®
is a registered Danfoss trademark
29
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