WITTUR servogearless WSG-S2.3, Руководство по эксплуатации

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Troubleshooting and fault elimination 8
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| BA 14.0197 | 11/2010
46
8 Troubleshooting and fault elimination
If any malfunctions should occur during operation of the drive system, 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 does not release Coil is interrupted
|
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 15. 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 the DC voltage at the rectifier using a
multimeter.
If DC voltage is zero:
|
Measure AC voltage at the rectifier.
If AC voltage is zero:
– Apply voltage
– Check fuse
– Check wiring
If AC voltage is ok:
– Check rectifier
– Replace defective rectifier
|
Check coil for fault between turns and short
circuit to ground.
|
If the rectifier defect occurs again, replace the
complete stator, even if no fault between turns or
short circuit to ground can be detected. The fault
may only occur when warm.
Incorrect wiring of microswitch Check the wiring of the microswitch and correct it.
Incorrect setting of microswitch Replace the complete stator and advise the
manufacturer of incorrect microswitch setting.
Air gap too large Adjust air gap ( 26)
Measure rotor thickness and compare with minimum
rotor thickness (
3.2). If necessary, replace rotor.
Rotor cannot rotate freely
Wrong setting of manual release Check dimension "s+s
Lü
" with energised brake. The
dimension must be identical at both sides. Correct if
necessary.
Air gap "s
Lü
" too small Check air gap "s
Lü
" and readjust it, if necessary
(chapter 4.4.4).