INTORQ BFK458 - Troubleshooting and Fault Elimination; Rotor Cannot Rotate Freely; Voltage Too High or Too Low

Troubleshooting and fault elimination
INTORQ | BA 14.0168 | 11/2018 72
Fault Cause Remedy
Brake cannot be re-
leased, air gap is not
zero
Incorrect micro-switch wiring Check the wiring of the micro-switch and correct it.
Micro-switch incorrectly set
Replace the complete stator and make a complaint about the
setting of the micro-switch to the manufacturer.
Air gap s
L
is too large Adjust the air gap (refer to Adjusting the air gap,Page66).
Rotor cannot rotate
freely
Wrong setting of hand-re-
lease
Check the dimensions s
LN
+ s
HL
with the brake energised. The
dimensions must be the same on both sides. Correct if required.
(Refer to Installing the hand-release (retrofitting)
,Page48.)
Air gap s
L
is too small
Check air gap s
L
and adjust if necessary (refer to Adjusting the
air gap,Page66).
Rotor thickness too
small
Rotor has not been replaced
in time
Replace the rotor (refer to Replace rotor,Page66).
Voltage too high
Brake voltage does not
match the rectifier
Adjust rectifier and brake voltage to each other.
Voltage too low
Brake voltage does not
match the rectifier
Adjust rectifier and brake voltage to each other.
Defective rectifier diode Replace the defective rectifier with a suitable undamaged one.
AC voltage is not
mains voltage
Fuse is missing or defective Select a connection with proper fusing.