Troubleshooting and fault elimination
INTORQ | BA 14.0214 | 10/2019
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Troubleshooting and fault elimination
If any malfunctions should occur during operations, please check for possible causes based on the following
table. If the fault cannot be fixed or eliminated by one of the listed steps, please contact customer service.
Fault
Cause
Remedy
Brake does not release
Coil interruption
¾
Measure coil resistance using a multimeter:
– If resistance is too high, replace the complete
stator.
Coil has contact to earth or
between windings
¾
Measure coil resistance using a multimeter:
– Compare the measured resistance with the
nominal resistance. Refer to Rated data for coil
powers for the values. If resistance is too low,
replace the complete stator.
¾
Check the coil for short to ground using a multi-
meter:
– If there is a short to ground, replace the com-
plete spring-applied brake.
¾
Check the brake voltage (refer to section on defect-
ive rectifier, voltage too low).
Wiring defective or wrong
Check the wiring and correct.
¾
Check the cable for continuity using a multimeter
– Replace a defective cable.
Rectifier defective or incorrect
¾
Measure rectifier DC voltage using a multimeter.
¾
If DC voltage is zero:
¾
Check AC rectifier voltage.
¾
If AC voltage is zero:
– Switch on power supply
– Check fuse
– Check wiring.
¾
If AC voltage is okay:
– Check rectifier,
– Replace defective rectifier
¾
Check coil for inter-turn fault or short circuit to
ground.
¾
If the rectifier defect occurs again, replace the en-
tire spring-applied brake, even if you cannot find
any fault between turns or short circuit to ground.
The error may only occur on warming up.
