®
R&M Materials Handling, Inc
LoadMate®
Chain Hoist
Springfield, Ohio USA
LM16-20-25 Manual
: 800 955-9967
April 2005
www.rmhoist.com
April 1, 2005
40
LM16-20-25-I&M
MANUAL-2005-0
6.5 Troubleshooting
Problem
Possible Cause
Possible Solution
Hoist does not lift or lower load
Emergency stop button is
activated
Deactivate button
Blown fuse
Replace the fuse
Pendant plug pin pushed out
Reinstall plug pin
Contactor terminal screws loose
Tighten screws
Mainline switch shut off
Turn switch on
Hoist does not lift load
Overload condition
Reduce load
Slip clutch worn or incorrectly
adjusted
Replace wear items or readjust
slip clutch torque
Motor thermal protection activated
Allow motor too cool down
Brake not releasing
Check brake coil resistance.
Check air gap setting. Adjust if
necessary.
Check rectifier output voltage.
Load drifts more than 4 inches
[100mm]
Brake lining worn
Air gap on brake is too wide
Replace wear items on brake as
necessary
Travel direction does not
correspond to that indicated on
push button
Power supply incorrectly
connected
See SECTION 2
Abnormal noises while lifting or
lowering
Load chain and its components
are not lubricated
Clean/Lubricate load chain.
Load chain is worn
Replace chain
Chain wheel or chain guide is
worn
Replace chain wheel or chain
guide
Idler sprocket is worn
Replace idler sprocket
A supply phase is missing
Connect the three phases
Twist or kink in load chain
Remove twist or kink
