What causes fault code CONV-011 (Conveyor Roller Motor Fault)?

MDR motor burned out — winding failure from overload. Zone controller card failed — not sending power to motor. O-ring drive band broken between MDR and slave rollers. Motor jam — product wrapped around roller shaft. 24VDC power supply to zone controller failed

How do I fix fault code CONV-011?

Check zone controller LEDs — identify which zone is faulted. Verify 24VDC power supply voltage — must be 24V ±10%. Check O-ring belts between MDR and slave rollers — replace if broken. Inspect MDR for product wrapped around shaft — clear debris. Swap MDR with known-good unit to confirm motor failure. Replace zone controller card if motor tests good

Conveyor Roller Motor Fault

CONV-011

Motorized drive roller (MDR) has faulted or stopped responding. Zone controller reports motor failure.

medium conveyor

conveyor mdr roller motor zone controller

Probable Causes (ranked)

MDR motor burned out — winding failure from overload
Zone controller card failed — not sending power to motor
O-ring drive band broken between MDR and slave rollers
Motor jam — product wrapped around roller shaft
24VDC power supply to zone controller failed

Fix Steps

1 Check zone controller LEDs — identify which zone is faulted
2 Verify 24VDC power supply voltage — must be 24V ±10%
3 Check O-ring belts between MDR and slave rollers — replace if broken
4 Inspect MDR for product wrapped around shaft — clear debris
5 Swap MDR with known-good unit to confirm motor failure
6 Replace zone controller card if motor tests good

Field Trick

Pull the O-ring belt off the MDR and spin the roller by hand. If it doesn't spin freely, the motor is seized. If it spins freely but doesn't run, check the zone card.

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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