Instructions / Assembly

22
20.0 Troubleshooting TS series Hoist
Table 10
Important: Any servicing performed on the brake or other electrical components must be done by qualified
persons only.
Trouble
Probable Cause
Suggested Remedy
Hoist will not respond
to controls.
Limit switch is tripped.
Move hook in opposite direction. If limit
switches need adjustment, have
qualified person inspect them.
Hoist overloaded.
Reduce load to within rated capacity.
No incoming power, or low voltage.
Check hoist connections to power
source. If low voltage, have certified
electrician check incoming power.
Fuse blown or circuit breaker tripped.
Replace fuse/re-set circuit breaker.
Broken wire to control pendant.
Locate and repair.
Incorrect phasing.
Switch any two of the three supply wires.
Brake won’t release; or rectifier
damaged in the phase protector.
Inspect continuity in brake; replace
phase protector.
Control contacts not opening/closing
properly.
Check electrical continuity; replace any
defective parts.
Faulty contactor.
Operate hoist manually; if successful,
then control circuit is faulty – locate and
repair. If hoist still does not run check
main supply. If input supply is correct but
output supply is faulty, replace contactor.
Motor malfunction.
Have motor inspected by a qualified
service technician; repair or replace as
needed.
Hoist operates only
intermittently.
Loose connectors; poor contacts; arcing.
Inspect all wiring and contacts.
Broken conductor in control cord
Test continuity of each conductor.
Replace cable if needed.
Hoist refuses to stop.
Welded contacts in contactor.
Replace contactor.
Hoist lifts but will not
lower.
Broken conductor in control cord.
Test continuity of each conductor.
Replace cable if needed.
Up/down switch malfunctioning.
Repair or replace switch.
Hoist lowers but will not
lift.
Hoist overloaded.
Reduce load to within rated capacity.
Up/down switch malfunction.
Repair or replace switch.
Load continues drifting
down excessively when
hoist is stopped.
Hoist overloaded.
Reduce load to within rated capacity.
Brake out of adjustment.
Adjust brake air gap. Replace brake
lining if worn.
Grease or oil on the lining.
Open hoist, disassemble brake and
clean the lining (qualified persons only).
Brake springs are damaged.
Replace brake springs.
Hoist moves in wrong
direction.
Incorrect phasing (230V model).
Switch any two of the three supply wires
Motor overheats.
Excessive load or too frequent use; or
affected by ambient temperature
Operate within rated load and according
to duty cycle rating. Limit use of hoist in
ambient temperatures over 104°.
Poor engagement of
chain with
sprocket/sheave.
Load chain is considerably worn.
Replace load chain.
Sprocket wheel, sheave or chain guide
is considerably worn.
Replace parts as needed.
Limit switch failure.
Bad connection of limit switch leads.
Inspect contacts of leads and limit
switches.
Limit switch damaged.
Replace.
Abnormal sounds.
Brake out of adjustment.
Inspect and adjust/repair as needed.
Dry chain or worn sprocket
Lubricate or replace as needed.