Symptom
Possible cause
Test
Solution
Motor not
running
Service switch open or missing
motor connection.
Check if the motor is connected and the
connection is not interrupted by a service
switch or other device.
Connect the motor and check the service
switch.
No mains power with 24 V DC
option card.
If the display is functioning, but there is no
output, check that mains power is applied to
the AC drive.
Apply mains power.
LCP Stop.
Check if [Off] has been pressed.
Press [Auto On] or [Hand On] (depending
on operating mode).
Missing start signal (Standby).
Check
parameter 5-10 Terminal 18 Digital Input
for correct setting for terminal 18. Use default
setting.
Apply a valid start signal.
Motor coast signal active
(Coasting).
Check
parameter 5-12 Terminal 27 Digital Input
for correct setting for terminal 27 (use default
setting).
Apply 24 V on terminal 27 or program
this terminal to
[0] No operation.
Wrong reference signal source. Check reference signal:
•
Local.
•
Remote or bus reference?
•
Preset reference active?
•
Terminal connection correct?
•
Scaling of terminals correct?
•
Reference signal available?
Program correct settings. Check
parameter 3-13 Reference Site
. Set preset
reference active in
parameter group 3-1*
References
. Check for correct wiring. Check
scaling of terminals. Check reference
signal.
Motor
running in
wrong
direction
Motor rotation limit.
Check that
parameter 4-10 Motor Speed
Direction
is programmed correctly.
Program correct settings.
Active reversing signal.
Check if a reversing command is programmed
for the terminal in
parameter group 5-1*
Digital inputs
.
Deactivate reversing signal.
Wrong motor phase
connection.
–
See
chapter 7.3.1 Warning - Motor Start
Motor is not
reaching
maximum
speed
Frequency limits set wrong.
Check output limits in
parameter 4-13 Motor
Speed High Limit [RPM]
,
parameter 4-14 Motor
Speed High Limit [Hz]
, and
parameter 4-19 Max
Output Frequency
Program correct limits.
Reference input signal not
scaled correctly.
Check reference input signal scaling in
parameter group 6-0* Analog I/O mode
and
parameter group 3-1* References.
Program correct settings.
Motor speed
unstable
Possible incorrect parameter
settings.
Check the settings of all motor parameters,
including all motor compensation settings.
For closed-loop operation, check PID settings.
Check settings in
parameter group 1-6*
Load Depen. Setting
. For closed-loop
operation, check settings in
parameter
group 20-0* Feedback.
Motor runs
rough
Possible overmagnetization.
Check for incorrect motor settings in all
motor parameters.
Check motor settings in
parameter groups
1-2* Motor data, 1-3* Adv Motor Data
, and
1-5* Load Indep. Setting.
Motor does
not brake
Possible incorrect settings in
the brake parameters. Ramp-
down times may be too short.
Check brake parameters. Check ramp time
settings.
Check
parameter groups
2-0* DC Brake
and
3-0* Reference Limits
.
Maintenance, Diagnostics, a...
Operating Guide
MG06I102
Danfoss A/S © 06/2018 All rights reserved.
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