Troubleshooting - R&M LOADMATE LM16 Installation And Maintenance Manual

LM16-20-25 I&M MANUAL/EN/11.30.2010
7.5

Troubleshooting

Table 11. Troubleshooting
PROBLEM
Hoist does not lift or lower load
Hoist does not lift load
Load drifts more than 4 inches
[100mm]
Travel direction does not
correspond to that indicated on
push button
Abnormal noises while lifting or
lowering
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POSSIBLE CAUSE
Emergency stop button is
activated
Blown fuse
Motor thermal protection
activated
Pendant plug pin pushed out
Contactor terminal screws loose
Mainline switch shut off
Overload condition
Slip clutch worn or incorrectly
adjusted
Brake not releasing
Brake lining worn
Air gap on brake is too wide
Power supply incorrectly
connected
Load chain and its components
are not lubricated
Load chain is worn
Chain wheel or chain guide is
worn
Idler sprocket is worn
A supply phase is missing
Twist or kink in load chain
POSSIBLE SOLUTION
Deactivate button
Replace the fuse
Allow motor to cool down
Reinstall plug pin
Tighten screws
Turn switch on
Reduce load
Replace wear items or readjust
slip clutch torque
Check brake coil resistance.
Check air gap setting.
Check rectifier output voltage.
Replace wear items as
necessary
Adjust air gap setting
See SECTION 3
Clean and lubricate load chain.
Replace chain
Replace chain wheel or chain
guide
Replace idler sprocket
Connect the three phases
Remove twist or kink
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