What causes KUKA Robot alarm KRC0347?

Mechanical jam or obstruction preventing normal axis movement. Motor winding short circuit or internal motor fault. Damaged or worn drive coupling causing binding or misalignment. Drive amplifier failure or defective power transistors in the servo drive. Cable damage or loose connections between controller and motor/encoder.

How do I fix KUKA Robot alarm KRC0347?

1. Verify the axis number from the alarm message and visually inspect that specific axis for mechanical obstructions or binding 2. Manually move the faulted axis through its full range of motion (if safe to do so) to confirm smooth operation and identify any resistance points 3. Check all motor cables, connectors, and encoder leads at both the motor terminals and drive module for corrosion, damage, or loose connections 4. Use a multimeter to measure motor winding resistance and compare against factory specifications to rule out internal winding shorts 5. Cycle power to the KRC controller and attempt to jog the axis with reduced speed and force limits to determine if the condition is intermittent 6. If the alarm persists, replace the servo drive module for the faulted axis or contact KUKA service for motor replacement if a winding fault is confirmed

KUKA Robot codes

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KUKA Robot Controller

Servo/Axis · Basic

Alarm KRC0347

KUKA Robot KRC0347 - ACKN. OVERCURRENT <axis number>

This alarm indicates that the acknowledged axis has detected an overcurrent condition in its motor drive circuit, exceeding the safe operating threshold. The overcurrent protection has been triggered, causing the axis to fault and stop motion to prevent damage to the motor windings and drive electronics. This is a critical safety alarm that requires immediate investigation and correction before the robot can resume operation.

KUKA RobotServo/AxisBasic

KRC0347

KUKA Robot KRC0347 - ACKN. OVERCURRENT <axis number>

ACKN. OVERCURRENT <axis number>

Common Causes

Mechanical jam or obstruction preventing normal axis movement
Motor winding short circuit or internal motor fault
Damaged or worn drive coupling causing binding or misalignment
Drive amplifier failure or defective power transistors in the servo drive
Cable damage or loose connections between controller and motor/encoder

Troubleshooting Steps

1Verify the axis number from the alarm message and visually inspect that specific axis for mechanical obstructions or binding
2Manually move the faulted axis through its full range of motion (if safe to do so) to confirm smooth operation and identify any resistance points
3Check all motor cables, connectors, and encoder leads at both the motor terminals and drive module for corrosion, damage, or loose connections
4Use a multimeter to measure motor winding resistance and compare against factory specifications to rule out internal winding shorts
5Cycle power to the KRC controller and attempt to jog the axis with reduced speed and force limits to determine if the condition is intermittent
6If the alarm persists, replace the servo drive module for the faulted axis or contact KUKA service for motor replacement if a winding fault is confirmed

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