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Ordering, Spare Parts, & Service
EQP Global IEC Series Low-Voltage 50/60 Hz Metric Motor
Service Guide
The following table lists operational symptoms that
may occur, probable causes, and the suggested
course of action. This table is intended as both a
diagnostic aid and a quick reference tool. If the
source of the malfunction is unknown, or the
recommendation is ineffective in achieving the
desired result, report the matter to the
Customer Support Center.
Symptom
Failure to start
Motor overheating
Noisy or overheating
bearings
20
TIC
Troubleshooting Assistance
Probable Cause
Loose, unattached, or incorrectly
fastened electrical connections.
Low line voltage.
Excessive load.
Open circuit in stator windings or
in squirrel cage bars.
Short circuit in rotor or stator.
Overloaded.
Improper line voltage or incorrect
frequency.
Ventilation obstructed.
Unbalanced electrical power.
Excessive heat, humidity, dirt,
etc., has adversely affected insu-
lation.
Misalignment between motor and
driven machine.
Excessive, low, or improperly
packed grease (if grease lubed).
Low oil level (if oil lubed).
Improper fit of bearings or in Bab-
bitt liners (especially in oil
grooves).
Excessive belt tension or exces-
sive load side thrust.
Contaminated oil.
Remedy
• Confirm connectivity.
• Tighten all mechanical and electrical
connections.
• Check panel meters.
• Reduce load.
• Remove load and retest.
• Run a continuity check. Check condition
of coils and bars. Repair if possible. If
impractical, order renewal parts from the
TIC Customer Support
Center.
• Reduce load.
• Clean motor.
• Check voltage of each phase.
• Failing bearings.
• Motor/load misalignment.
• Perform an insulation resistance check
with a megohmmeter.
• Check alignment and correct as
necessary.
• Clean bearings and repack with proper
viscosity grease. Check for damage.
• Drain and fill to correct level with correct
viscosity. Check for scoring of bearing
surfaces.
• Replace bearings if damaged.
• Reduce belt tension or load side thrust.
Check alignment and correct as
necessary.
• Drain oil, flush clean, and refill with
recommended oil.
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