Watts Lync WQ-RS, Installation, Operation And Maintenance Manual

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Lync WQ-RS
SECTION 3: OPERATION
L- OMM-005_A
•
2/23/2022
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of 34
MOTOR TROUBLE SHOOTING CHART
TROUBLE CAUSE WHAT TO DO
Motor may have one phase open Check to make sure that all leads are well
connected.
Unbalanced terminal voltage Check for faulty leads, connections and
transformers.
Motor vibrates
after correcting
have been made Motor misaligned Realign
Weak support Strengthen base.
Coupling out of balance Balance coupling.
Driven equipment unbalanced Rebalance driven equipment.
Defective ball bearing Replace bearing.
Bearing not in line Line properly.
Balancing weights shifted Rebalance motor.
Polyphase motor running single
phase Check for open circuit.
Excessive end play Adjust bearing or add washer.
Unbalanced line
current on
polyphase
motors during
normal
operation
Unequal terminal volts Check leads and connections
Single phase operation Check for open contacts
Scraping noise Fan rubbing air shield Remove interference.
Fan striking insulation Clear fan.
Loose on bedplate Tighten holding bolts.
Noisy operation Airgap not uniform Check and correct bracket fits or bearing.
Rotor unbalance Rebalance.
Hot bearings general Bent or sprung shaft Straighten or replace shaft.
Excessive belt pull Decrease belt tension.
Pulleys too far away Move pulley closer to motor bearing.
Pulley diameter too small Use larger pulleys.
Misalignment Correct by realignment of drive.
Hot bearings ball Insufficient grease Maintain proper quantity of grease in bearing.
Deterioration of grease, or lubricant
contaminated Remove old grease, wash bearings thoroughly in
kerosene and replace with new grease.
Excess lubricant
Reduce quantity of grease: bearing should not
be more than 1/2 filled.
Overloaded bearing Check alignment, side and end thrust.
Broken ball or rough races Replace bearing: first clean housing thoroughly.
These instructions do not cover all details or variations in equipment nor provide for every
possible condition to be met in connection with installation, operation or maintenance. Chart
courtesy of Marathon Electric.