Troubleshooting - KEB COMBISTOP Instruction Manual

Maintenance and Troubleshooting

8.3 Troubleshooting

The following are some common issues that may occur with the COMBISTOP type 38
brake, as well as steps to resolving these issues.
Before performing any troubleshooting, follow all relevant safety guidelines.
→ See section Maintenance Safety Guidelines for details.
Problem
Brake Does
Not Release
Brake Does
Not Engage
Brake
Engagement
Delay, Long
Reaction Time
Microswitch
Does Not
Switch
48
i
 Contact your local KEB agency for any problems not covered by
this manual, or if the troubleshooting steps listed do not fully
resolve the problem.
Potential Causes
Incorrect voltage
Rectifier failure
Air gap too large /
maximum air gap reached
Foreign particles between
armature and lining
Magnet coil or connecting
cable defective
Excessive heating from
high duty cycle
Damaged hub and lining
interface
Friction surfaces
contaminated
Hub rubbing on armature
Hand release m
dimension too small
Brake is switched on the
AC side of the rectifier.
The setting point of the
microswitch has been
changed.
Solution
Only operate the brake with the correct
voltage (see brake label for details)
Replace the rectifier.
Adjust air gap or replace the friction lining.
→ See section.
Remove foreign particles. Use industrial
brake cleaner to clean the brake.
Replace the brake.
Install a high-speed circuit breaker (for
example, KEB Powerbox)
Replace the friction lining and hub.
Clean the friction surfaces. Replace if
necessary.
Relocate the hub position to adjusting
dimension m.
→ See section Installing the Brake.
Readjust to proper adjusting dimension m.
See section Installing the Hand Release
Lever.
Switch the brake on the DC side of the
rectifier.
Check the microswich and adjust as
necessary, or replace the microswitch.
→ See section Adjusting the
Microswitch Settings.
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