Installation and Operational Instructions for
ROBA-stop
®
-S brake Type 856. _ _ _ . _
Sizes 8, 9 and 10 (B.8.3.GB)
03/11/2010 TK/KE/GC/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
D-87665 Mauerstetten http://www.mayr.de
Page 14 of 14 Germany E-Mail: info@mayr.de
Malfunctions / Breakdowns:
Results of Malfunction Possible Causes Solutions
Brake does not release
Abraded particles between the armature disk and
the coil carrier.
Air gap too large
Air gap too small (remove the distance washers
before reaching the max. air gap)
Coil interruption
Rectifier failure
Incorrect voltage on rectifier
Clean the brake
Re-adjust the brake; replace the brake
Insert distance washers between the coil
carrier and the flange plate
Replace brake
Replace rectifier
Apply correct voltage
Brake does not brake
Emergency release screws are not loosened
Grease or oil on the friction surfaces
Loosen the emergency release screws
Replace rotor
Release monitoring
does not emit a signal
Abraded particles between the armature disk and
the coil carrier.
Switching position misaligned
Defective microswitch
Clean the brake
Adjust the switch again
Replace the switch
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