INTORQ BFK455, Руководство по эксплуатации

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Troubleshooting and fault elimination 8
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| BA 14.0196 | 05/2013
48
8 Troubleshooting and fault elimination
If any malfunctions should occur during operation, please check the possible causes using the
following table. If the fault cannot be eliminated by one of the listed measures, please contact
the aftersales service.
Fault Cause Remedy
Brake cannot be released, air
gap is not zero Coil interruption
|
Measure coil resistance using multimeter:
– If resistance is too high, replace the complete stator.
Coil has interturn fault or short circuit to
ground
|
Measure coil resistance using multimeter:
– Compare measured resistance to rated resistance. For
values, see

16. If the resistance is too low, replace
the complete stator.
|
Check coil for short circuit to ground using a multimeter:
– Replace the complete stator if short circuit to ground
is detected.
|
Check brake voltage (see ”defective rectifier, voltage too
low”).
Wiring incorrect or defective
|
Check and correct wiring.
|
Check cable continuity using a multimeter:
– Replace defective cable.
Rectifier defective or wrong
|
Measure rectifier DC voltage using a multimeter.
If DC voltage is zero:
|
Check AC rectifier voltage.
If AC voltage is zero:
– Apply voltage,
– check fuse,
– check wiring
If AC voltage is ok:
– Check rectifier
– replace defective rectifier
If DC voltage is too low:
– Check rectifier
– If diode is defective, use suitable new rectifier
|
Check coil for fault between turns and short circuit to
ground.
|
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 fault may occur later during
heating-up.
Incorrect microswitch wiring Check microswitch wiring and correct it.
Incorrect microswitch setting Replace the complete stator and complain about the
incorrect microswitch setting to the manufacturer.
Air gap too big
|
For adjustable brakes:
– Readjust air gap.
|
For non-adjustable brakes:
– Replace all rotors.
Rotor cannot rotate freely Air gap s
L
too small Readjust air gap s
L
,

27.