What causes fault code CONV-003 (Conveyor Motor Overtemperature)?

Overloaded conveyor — too much product weight on belt. Motor cooling fan blocked or failed. Ambient temperature in plant is excessive. Motor bearings failing — added friction generates heat. VFD running motor at low speed for extended time — reduced cooling

How do I fix fault code CONV-003?

Reduce belt loading — spread product out or reduce throughput temporarily. Check motor fan — clean debris, verify fan spins freely. Measure motor surface temp with IR gun — compare to nameplate temp rise. Check motor bearings — listen with stethoscope or vibration pen. If running at low speed continuously, switch to inverter-duty motor with forced cooling. Allow motor to cool down before restarting — minimum 30 minutes

Conveyor Motor Overtemperature

CONV-003

Conveyor drive motor temperature has exceeded alarm threshold. Motor protection tripped to prevent winding damage.

medium conveyor

conveyor motor overtemperature cooling overload

Probable Causes (ranked)

Overloaded conveyor — too much product weight on belt
Motor cooling fan blocked or failed
Ambient temperature in plant is excessive
Motor bearings failing — added friction generates heat
VFD running motor at low speed for extended time — reduced cooling

Fix Steps

1 Reduce belt loading — spread product out or reduce throughput temporarily
2 Check motor fan — clean debris, verify fan spins freely
3 Measure motor surface temp with IR gun — compare to nameplate temp rise
4 Check motor bearings — listen with stethoscope or vibration pen
5 If running at low speed continuously, switch to inverter-duty motor with forced cooling
6 Allow motor to cool down before restarting — minimum 30 minutes

Field Trick

If the motor surface is too hot to hold your hand on for 3 seconds, it's over 60°C and probably above Class B insulation rating. Don't restart until it cools.

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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