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TrOUbLESHOOTING
8 Troubleshooting
The following table shows some causes and solutions of malfunctions during brake op-
eration. If this does not solve the problem or if other malfunctions occur, please contact
our service department.
Malfunction
Brake does not
release
no braking function
Brake operates with
delay, long connec-
tion time
Cause
incorrect voltage
Rectifier failed
Air gap too large, maxi-
mum air gap reached
Foreign particles between
armature and lining
Magnet coil or connecting
cable defective
excessive heating
Damaged teeth impede
movement of armature
Friction surfaces contam-
inated
Brake is switched on AC
side
Measures
Only operate the brake with the
correct voltage (see type plate of
the brake).
Replace the rectifier.
Replace wearing parts.
Remove the foreign particles.
Use non-greasing cleaning
agents to clean the brake.
Replace the brake.
Install a high-speed circuit
breaker (for example, KEB Pow-
erbox).
Replace the lining and the hub.
Clean the friction surfaces, re-
place if necessary.
Switch the brake on DC side.
35
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