Troubleshooting and fault elimination
INTORQ | BA 14.0222 | 06/2020
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Troubleshooting and fault elimination
If any malfunctions should occur during operations, please check for possible causes based on the follow-
ing table. If the fault cannot be fixed or eliminated by one of the listed steps, please contact customer ser-
vice.
Fault
Cause
Remedy
Brake cannot be re-
leased, air gap is not
zero
Coil interruption
¾
Measure coil resistance using a multimeter:
- Compare the measured resistance with the nominal resis-
tance. Refer to Rated data for coil powers for the values.
- If resistance is too high, replace the complete spring-applied
brake.
Coil has contact to earth or
between windings
¾
Measure coil resistance using a multimeter:
- Compare the measured resistance with the nominal resis-
tance. Refer to Rated data for coil powers for the values. If re-
sistance is too low, replace the complete stator.
¾
Check the coil for short to ground using a multimeter:
- If there is a short to ground, replace the complete spring-
applied brake.
¾
Check the brake voltage (refer to section on defective recti-
fier, voltage too low).
Wiring defective or wrong
Check the wiring and correct.
¾
Check the cable for continuity using a multimeter
- Replace the defective cable.
Air gap "s
L
" is too large
Replace the brake.
Voltage too low
Check the power supply unit
Rotor cannot rotate
freely
Air gap "s
L
" too small
Brake is mounted incorrectly
