WITTUR WSG-SF Series, Operating Instructions Manual

Page: 23 / 112

Subject to changes without notice ! Änderungen vorbehalten !
Gearless Lift Machine
WSG-SF
Operating Instructions
EN
Code: GM.8.004284.EN
Date: 28. Jan 2020
Version: 0.16
Page: 23
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
Inverter 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 (see
inverter’s instruction manual)
Measuring system defective Replace measuring system
Motor noise Inverter parametrisation incorrect Check inverter parametrisation
Bearing defective Notify customer service
Motor temperature too high Motor surface dirty Clean the motor surface
Ambient temperature too high Improve shaft and machine room ventilation
Inverter parametrisation incorrect Check inverter parametrisation
Braking system does not release Braking system is not supplied with
voltage
Check electrical connection
Brake 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 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 Notify customer service
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
Notify customer service
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