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4.2
4.2
4.2
4.2 Mechanism:
Mechanism:
Mechanism:
Mechanism:
Trouble
Possible Cause
Troubleshooting
Motor will
Not run.
1. Blown fuse or tripped circuit
1. Check your power source for blown(open)
breaker.
fuses. With motorized trolley option check for
tripped circuit breaker in the trolley control box.
2. Motor has overheated.
2. Check the motor brake, is it releasing? Measure
the motor amperage, does it match the motor
name plate data? Note: Overloading or excessive
Jogging will cause high current draw, which in
turn will cause the motor to overheat.
3. Contactor malfunctions.
3. Replace the contactor.
4. Low Voltage.
4. Check the incoming voltage, is it correct?
5. Control circuit is off.
5. Check the control transformer output voltage is
the fuse blown (open)?
Examine for loose connections, broken switches
or damage to the cable or plug.
Motor
makes loud
growling or
buzzing noise
1. Wrong voltage.
1. Confirm that the voltage of your hoist matches
your power supply voltage.
2. Single phase condition.
2. Check your power source for blown (open)
fuses. Check the hoist contactor for loose wires
or burnt (open) contact point.
3. Motor has overheated.
3. Check the motor brake, is it releasing? Measure
the motor current draw, is it correct? Note:
Overloading or excessive jogging will cause high
current draw, which in turn will cause the motor
to overheat.
4. Damaged motor.
4. Check the motor windings, are they grounded?
Hoist
operates in
Only one
direction
1. Hoist Up motion only? The
1. Check the motor brake, is it releasing? Measure
motor O.L. has tripped(opened)
the motor current draw, is it correct? Note:
due to excessive overheating.
Overloading or excessive jogging will cause high
current draw, which in tum will overheat the
motor
2. Limit switch is tripped because
2. Side pulling will cause the limit paddle to trip,
side pulling.
always center the hoist over the lifted load.
3. Limit paddle is bent or
3. Repair, lubricate or replace limit paddle.
corroded and sticking
4. Push button switch or cable is
4. Examine for loose connections, broken switches
broken.
or damage to the cable or plug.
5. Contact point of magnetic
5. Install new magnetic contactor.
contactor burned (open)
Hoist brake
will not hold.
1. The distance between the
1. Adjust the brake according to the directions, air
brake magnet and armature
Gap=1mm minimum to 1.5mm maximum.
Plate (air gap) is too large.
2. The brake is worn out.
2. When the lining wear is 50% the thickness of the
brake lining(3.5mm), the brake discs (pads)
must be replaced.
Remarks:
Remarks:
Remarks:
Remarks: Hoist
Hoist
Hoist
Hoist Motor
Motor
Motor
Motor has
has
has
has Class
Class
Class
Class H
H
H
H Insulation,
Insulation,
Insulation,
Insulation, Trolley
Trolley
Trolley
Trolley Motor
Motor
Motor
Motor has
has
has
has Class
Class
Class
Class E
E
E
E Insulation
Insulation
Insulation
Insulation
