What causes fault code GEN-MOT1 (Motor Bearing Temperature High)?

Bearing lubrication inadequate — dry or contaminated grease. Bearing wear — end of life approaching. Misalignment between motor and driven equipment. Over-greasing — excess grease causing heat. Bearing current damage from VFD — electrical discharge machining (EDM)

How do I fix fault code GEN-MOT1?

Compare bearing temp to opposite end bearing — both should be similar. Check lubrication schedule — add grease per manufacturer spec. Do NOT over-grease: use calculated volume, not 'until it squeezes out'. Check alignment — misalignment loads bearings unevenly. If VFD-driven, install shaft grounding ring to prevent bearing current damage. Schedule bearing replacement if temperature is trending up consistently

Motor Bearing Temperature High

GEN-MOT1

Motor bearing temperature sensor (RTD or thermocouple) reading above warning threshold. Bearing failure may be developing.

medium general conveyor packaging

motor bearing temperature lubrication alignment

Probable Causes (ranked)

Bearing lubrication inadequate — dry or contaminated grease
Bearing wear — end of life approaching
Misalignment between motor and driven equipment
Over-greasing — excess grease causing heat
Bearing current damage from VFD — electrical discharge machining (EDM)

Fix Steps

1 Compare bearing temp to opposite end bearing — both should be similar
2 Check lubrication schedule — add grease per manufacturer spec
3 Do NOT over-grease: use calculated volume, not 'until it squeezes out'
4 Check alignment — misalignment loads bearings unevenly
5 If VFD-driven, install shaft grounding ring to prevent bearing current damage
6 Schedule bearing replacement if temperature is trending up consistently

Field Trick

If one bearing is 20°F hotter than the other on the same motor, that's your problem bearing. The hot one is failing.

Suggested Replacement Parts

Parts matched to fault category: Motor

Baldor/ABB 1HP TEFC Motor P/N: EM3554T 1HP, 1765RPM, 143TC frame, 230/460V, TEFC, premium efficiency

AutomationDirect $285.00 Amazon $310.00 Grainger $345.00

Prices are estimates. Verify part numbers match your equipment before ordering.

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