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Troubleshooting and fault elimination
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Troubleshooting and fault elimination
If any malfunctions should occur when operating the braking system, please check for possible causes
based on the following table. If the fault cannot be fixed or eliminated by one of the listed measures, please
contact customer service.
Brake malfunction
Fault
Brake does not release
INTORQ | BA 14.0197 | 04/2016
Cause
Coil interruption
Coil has contact to earth or
between windings
Wiring defective or wrong
Rectifier defective or incorrect ❚ Measure rectifier DC voltage using a multimeter.
Remedy
❚ Measure the coil resistance using a multimeter:
- If resistance is too high, replace the complete stator.
❚ Measure the coil resistance using a multimeter:
- Compare the measured resistance with the nominal
resistance. Refer to
ance is too low, replace the complete stator.
❚ Check the coil for short to ground using a multimeter:
- If there is a short to ground, replace the complete
stator.
❚ Check the brake voltage (see Defective rectifier, volt-
age too low).
❚ Check and correct
❚ cable for continuity using a multimeter
- Replace defective cable.
If DC voltage is zero:
❚ Check AC rectifier voltage.
If AC voltage is zero:
- Switch on power supply
- Check fuse
- Check wiring.
If AC voltage is OK:
- Check rectifier,
- Replace the defective rectifier
- Diode is defective; use a suitable new rectifier
❚ Check the coil for winding short or ground short.
❚ If the rectifier defect occurs again, replace the entire
stator, even if you cannot find any fault between turns or
short circuit to ground. The error may only occur on
warming up.
16 for the values. If resist-
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