Page 27
Date 11.29.2016
Version A
Code J40069
Subject to changes without notice!
Gearless Synchronous Lift Machines
WSG-10
Operating and Maintenance Manual
12.9 Replacing the measuring system
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 incorrectly set
• Measuring system defective
• Connect motor correctly
• Connect measuring system correctly
• Check converter parametrisation
• Carry out shielding and earthing measures
as described by the converter manufacturer
• Check measuring system offset angle
• Replace measuring system
Motor noise
• Bearing defective
• Converter parametrisation incorrect
• Notify customer service
• Check converter parametrisation
Braking system does not release
• Braking system is not supplied with voltage
• Brake magnet voltage too low
• Brake 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
• Brake defective
• Notify customer service
Brake makes loud switching noise
• Brake air gap too large
• Adjust brake air gap
Braking torque too low
• Brake friction surface or brake linings dirty
• Foreign bodies between friction surface and
brake lining
• Brake friction surface or brake lining have
come into contact with oily or greasy materials
thoroughly
• Load torque too high
• Clean friction surface / brake linings
• Remove foreign bodies
• Replace brake lining, clean brake drum
• Reduce load torque
Summary of Contents for WSG-10
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