Jet 131000 1ss-3c-10 - 1-ton capacity 10-ft 3-phase electric chain hoist User Guide
20
Troubleshooting
Trouble Probable
Cause
Remedy
Motor will not run.
No incoming power, or low voltage.
Check hoist connections to power
source. If low voltage, have certified
electrician check incoming power.
source. If low voltage, have certified
electrician check incoming power.
Fuse blown or circuit breaker tripped.
Replace fuse/re-set circuit breaker.
Rectifier damaged in the phase
protector so that the brake won’t work.
protector so that the brake won’t work.
Replace phase protector.
Transformer damaged.
Replace transformer.
Motor damaged.
Have motor replaced by a qualified
service technician.
service technician.
Hoist lifts but will not
lower.
lower.
Broken conductor in pendant cord.
Test continuity of each conductor.
Replace cable if needed.
Replace cable if needed.
Up/down switch malfunctioning.
Repair or replace switch.
Hoist lowers but will
not lift.
not lift.
Overloaded.
Reduce load to within hoist capacity.
Up/down switch malfunctioning.
Repair or replace switch.
Clutch malfunction.
Have clutch replaced by qualified
personnel.
personnel.
Load continues drifting
down excessively
when hoist is stopped.
down excessively
when hoist is stopped.
Grease or oil on the lining.
Open the hoist, disassemble the brake
and clean the lining.
and clean the lining.
Disc brake is worn.
Adjust clearance between armature and
iron core. See page 16.
iron core. See page 16.
Brake springs are damaged.
Replace brake springs.
Hoist moves in wrong
direction.
direction.
Two of the three power supply wires are
switched.
switched.
Switch any two of the three supply wires
(see page 10).
(see page 10).
Motor overheats.
Excessive load or too frequent use.
Operate within rated load and according
to duty cycle rating.
to duty cycle rating.
Brake drags.
Adjust brake clearance (see page 16).
Poor engagement of
chain with
sprocket/sheave.
chain with
sprocket/sheave.
Load chain seriously worn.
Replace load chain. See pages 14 and
15 .
15 .
Sprocket wheel, sheave or the chain
guide is seriously worn.
guide is seriously worn.
Replace parts as needed.
Will not lift rated load.
Overload limit clutch friction torque too
low.
low.
Readjust the overload clutch to proper
limits (qualified personnel only).
limits (qualified personnel only).
Overload limit clutch damaged.
Replace overload limit clutch.
Limit switch failure.
Bad connection of limit switch leads.
Inspect the contacts of the leads and
limit switches.
limit switches.
Limit switch damaged.
Replace limit switch.