Subject to changes without notice !
Änderungen vorbehalten !
Gearless Lift Machine
WSG-25
Operating Instructions
EN
Code: GM.8.002673.EN
Date:
07. May 2019
Version: 0.13a
Page: 21
7.4. Trouble shooting
Fault
Possible cause
Remedy
Motor does not start, operates out of
control or develops no torque
Motor not connected in proper phase
sequence
Connect motor correctly
Measuring system not properly connected Connect measuring system correctly
Converter parametrisation incorrect
Check inverter parametrisation
EMC disturbance
Carry out shielding and earthing measures as
described by the inverter manufacturer
Measuring system offset angle incorrectly
set
Check measuring system offset angle
Measuring system defective
Replace measuring system
Motor noise
Converter parametrisation incorrect
Check inverter parametrisation
Bearing defective
Notify customer service
Motor temperature too high
Motor surface dirty; Filter mats of the
forced cooling fan dirty
Clean the motor surface and the fan filter mats
Forced cooling fan not in operation
Operate forced cooling fan correctly
Ambient temperature too high
Improve shaft and machine room ventilation
Converter parametrisation incorrect
Check inverter parametrisation
Braking system does not release
Braking system is not supplied with
voltage
Check electrical connection
Brake shoes mechanically blocked
Remove mechanical blocking
Brake control unit defective
Replace brake control unit
Delay in braking system release
Brake control unit defective
Replace brake control unit
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”
Change over to brake control by AC side
switching in “normal operation”
Brake air gap too large
Adjust brake air gap
Braking torque too low
Brake friction surface or brake linings dirty Clean friction surface / brake linings
Foreign bodies between friction surface
and brake lining
Remove foreign bodies
Brake friction surface or brake lining have
come into contact with oily or greasy
materials
Replace brake lining, clean brake drum
thoroughly
Load torque too high
Reduce load torque
Condition monitoring of the brakes
does not switch
Micro-switch defective
Replace micro-switch
Micro-switch adjustment faulty
Adjust micro-switch
Dirty contacts
Use micro-switch with at least 10 mA contact
current, Replace micro-switch
