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ELECTRIC WIRE ROPE HOIST
XM SERIES
4.11 TROUBLESHOOTING
The following tables show the possible malfunctions of
the individual functions of the trolley/hoist.
Component fault table
Component/fault type
Cause
Solution
Brake slipping
- Worn brake lining
- Presence of oil and grease
- Adjust the clearance or replace the brake
lining
- Clean the brake lining
Disk brake
vibration
- Improper supply voltage (too low)
- Supply with only one phase
- Excessive air gap between magnetic
components
- Restore the original, proper conditions
- Adjust the air gap
Brake overheating
excessively
- Improper duty cycle
- Improper adjustment
- Operation under unsuitable conditions or out of
normal duty
- Restore the foreseen working conditions
- Restore proper conditions
The limit switch stuck
open
- Clogging
- Connections broken
- Clean and restore the original conditions
Keypad push buttons
stuck closed
- Clogging
- Clean
- Check the keypad conductor
Stuck contacts on
the electromagnetic
switches
- Lack of maintenance
- Operation under unsuitable conditions or out of
normal duty
- Restore proper working conditions
Motor
overheating
- Higher voltage fluctuations as the permitted ±
10%
- Lack of cooling air, possible clogging of air
passages
- Higher environment temperatures as planned
for the operation
- Operation of equipment not within the foreseen
duty cycle
- Ensure the proper power voltage supply
- Restore the proper air circulation
- Restore suitable environmental conditions
or adapt the function features of the motor
to the new conditions
- Adapt the operation conditions to those
planned
The motor does not start - Blown fuse
- The contactor interrupted the power supply
- Overload, blockage, high start frequencies,
inadequate protections
- Replace the fuse
- Verify the contactor of the function
- Repair the motor winding and ensure a
better protection
- Check the keypad
The motor starts
with difficulty
- At start-up, voltage or frequency are well below
their rated values
- Improve the conditions of the line or of the
main power supply
The motor hums and
draws much current
- Faulty windings
- The rotor contacts the stator
- Lack of one phase of the power supply
- Gearbox seized
- Brake seized
- Power cables short circuit
- Motor short circuit
- Have repaired by a specialist
- Check the main power supply and/or the
contactor
- Call for a specialised technician
- Check and, if necessary, adjust
- Repair the short circuit
- Call for a specialised technician
Short circuiting
in the motor
winding
- Faulty winding
- Repair the motor winding
False contact
- Accidental activation of the function
- Check the keypad conductor
The column of the "component fault table" lists the
fault, the relevant function and the possible causes.
4. OPERATION AND MAINTENANCE INSTRUCTIONS
Summary of Contents for XM SERIES
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