Prowinch PWH - Troubleshoooting

36
Troubleshoooting
| 36 | Version 1.0
Faults, Cause, and Correction
Faults Major Cause Check Items Remarks
Does not
operate
in non-load
state
Brake
inaudible
Contactor is inau-
dible
Excessive voltage Power
Operating circuit break-o,
electric parts overheating
Power supply
Internal wiring
Contactor
Transformer
Up/Down limit switch
Button switch
Contactor is
audible
Power circuit break-o,
overheating motor, brake
Motor
Brake
Internal wiring
Contactor (junction fusing)
Brake audible Drive overheating, broken bearing
Gear
Bearing
Operates in
non-load state
Unable to lift (motor roar)
Default phase (single phase opera-
tion)
Power
Feed power
Motor
Contactor(junction fusing)
Slow lifting Low voltage Feed power
Unintended
reaction from
button
Inverse reaction from button
Anti-phase wiring Feed power
Incorrect wiring
Internal wiring
Button switch
No reaction after pressing button
Circuit wire break
Internal wiring
Button switch
Electric installation parts
Contactor
Up/Down limit switch
Contactor
Brake
Feed power
Internal wiring
Load chain
Load pulley, bare pulley
Gear
Bearing
Noise of brake
Running (grating) Drag Brake
Stop Wear of friction plate Brake
Abnormal noise of rail curve
(grating)
Obstruction of orbit/wheel Operation of trolley