Prowinch PWJTHF, User Manual

Page: 44 / 51

Version 1.0 Version 1.0
Troubleshooting
44
44
Limit switch
Push button switch
Condition Reason Action Cause Correction
No operation (Contactor)
Contact fused
Operate limit switch. Check conti -
nuity of contactor, replace if result
is negative
Limit switch overuse Avoid overuse of switch
Wire break
Inspect cable, change if wire break -
age or replace limit switch
Vibration, drop
Avoid excessive bumping in
usage
Movable parts
rusting
Check movable parts such as limit
lever. Remove if rusty or replace if
adhesive
Set in Up/Down limit for
long time
Do not set in Up/Down limit
Motor did not stop upon
reaching upper and lower limit
Contact welded
Operate limit switch. Check conti -
nuity of contactor, replace if does
not open
Limit switch used frequently Avoid overuse of limit switch
Rusting of movable
parts
Check movable parts such as limit
lever. Remove if rusty or replace if
adhesive
Infrequent usage; use in
moist environments.
Regular inspection
Wiring error
Reference wiring diagram. If limit
switch cable is properly connected,
it is inversely connected. Swap 2
wire power cords
Wiring error
Properly connect wire power
cords as per wiring diagram
Condition Reason Action Cause Correction
No operation
(Contactor)
Emergency button is
pressed
Turn button right to recover Emergency button not reset Read User Manual before usage
Switch gear fault Conduction contacts, replace switch
if off
Vibration, drop
Avoid excessive bumping in
usage
Wiring break
Check if button cable is correctly
connected to switch device. Repair
if broken
Vibration, drop
Avoid excessive bumping in
usage
Terminal screw loose Tighten screw Vibration, drop
Avoid excessive bumping in
usage
Button cable wire
break
Replace cable or button cable when
wire break
Cable coating damaged
Avoid contact with other
equipment during operation
Faulty installation Install protection line firmly
Action does not correspond with
display
Wiring error
Reference wiring diagram. If limit
switch cable is properly connected,
it is inversely connected. Swap 2
wire power cords
Wiring error
Properly connect wire power
cords as per wiring diagram
Operation continues upon button
release
Faulty switch gear
part
Replace switch if not smooth. Vibration, drop
Avoid excessive bumping in
usage
V.07.22 [LA]