Gearless Lift Machine
WSG/WGG-29
Operating Instructions
Code
GM.8.002662.EN
Date
04.02.2019
Version
0.19
Page
24
Subject to changes without notice ! Subject to changes without notice !
EN
Fault
Possible cause
Remedy
Motor does not start, operates out of
control or develops no torque
•
Motor not connected in proper
phase sequence
•
Measuring system not properly
connected
•
Converter parametrisation incorrect
•
EMC disturbance
•
Measuring system offset angle in-
correctly set
•
Measuring system defective
•
Connect motor correctly
•
Connect measuring system correctly
•
Check inverter parametrisation
•
Carry out shielding and earthing mea-
sures as described by the inverter man-
ufacturer
•
Check measuring system offset angle
•
Replace measuring system
Motor noise
•
Bearing defective
•
Converter parametrisation incorrect
•
Notify customer service
•
Check inverter parametrisation
Braking system does not release
•
Braking system is not supplied with
voltage
•
Brake magnet voltage too low
•
Brake shoes mechanically blocked
•
Overexcitation rectifier defective
•
Check electrical connection
•
Check braking voltage supply voltage
•
Remove mechanical blocking
•
Replace overexcitation rectifier
Delay in braking system release
•
Overexcitation rectifier defective
•
Replace overexcitation rectifier
Braking system does not engage
•
Brake shoe mechanically blocked
•
Remove mechanical blocking
Delay in engaging of braking system
•
Switch-off time too short with AC
side switching
•
Brake control using DC side switching
of the overexcitation rectifier
Brake makes loud switching noise
•
DC side switching of the brake in
"normal operation"
•
Brake air gap too large
•
Change over to brake control by AC
side switching in "normal operation"
•
Adjust brake air gap
Braking torque too low
•
Brake friction surface or brake lin-
ings dirty.
•
Foreign bodies between friction
surface and brake lining
•
Brake friction surface or brake lin-
ing have come into contact with
oily or greasy materials
•
Load torque too high
•
Clean friction surface / brake linings
•
Remove foreign bodies
•
Replace brake lining, clean friction
surface thoroughly
•
Reduce load torque
6.8. Trouble shooting
