BA 5814 en 09/2014
Faults
Remedy
Causes
Main drive motor does not
start.
Wrong direction of rotation of the
motor.
Overrunning clutch blocked.
Wrong installation and/or defect of
cage with sprags of
overrunning
clutch.
Change polarity of motor.
Contact Customer Service.
Install a new overrunning clutch.
Contact Customer Service.
Install cage of overrunning clutch
turned by 180° and/or replace.
Auxiliary drive motor does not
start.
Overload on output.
Motor of auxiliary drive unit
defective.
Motor brake is not released.
Load reduction.
Repair or replace the motor.
Correct electrical connection of
motor brake; replace motor brake,
if necessary.
Auxiliary drive motor will start,
but the output shaft of the main
gear unit will not rotate.
Wrong direction of rotation of the
auxiliary motor.
Incorrect installation and/or defect
of cage with grippers of overrunning
clutch.
Overrunning clutch defective.
Change polarity of motor.
Contact Customer Service.
Install cage of overrunning clutch
turned by 180° and/or replace.
Contact Customer Service.
Install a new overrunning clutch.
Main motor can start, although
auxiliary drive unit with
speedmonitoring device is in
operation.
Electrical interlocking between
main and auxiliary motor is
defective.
Speedmonitoring device is
defective.
Check connections; replace
defective units, if necessary.
Check connections; replace
defective units, if necessary.
Temperature at backstop too
high.
Locking function fails.
Damage to backstop.
Contact Customer Service.
Check backstop and,
if necessary, replace.