User Manual

ManualsBrandsR&M Materials Handling ManualsHoistELECTRIC CHAIN HOISTS LoadMate Chain Hoist LM 5

LM05 SERIES II I&M MANUAL/EN/11.30.2010

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may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials Handling, Inc.

8.5 Troubleshooting

Table 15. 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

Motor thermal protection activated Allow motor to cool down

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

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 as necessary

Adjust air gap setting

Travel direction does not correspond to

that indicated on push button

Power supply incorrectly connected See SECTION 3

Abnormal noises while lifting or lowering

Load chain and its components are not

lubricated

Clean and 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