KUKA Robot codes
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KUKA Robot Controller

System · Intermediate

Alarm KRC0350

KUKA Robot KRC0350 - ACKN. FEEDBACK SWITCH ON TOO LONG **

This alarm indicates that the acknowledgment feedback switch remained active for an excessively long duration during axis braking operations. The brake control circuit detected prolonged feedback signal presence, suggesting either a mechanical brake issue or an electrical control signal malfunction in the brake acknowledgment circuit.

KUKA RobotSystemIntermediate

KRC0350

KUKA Robot KRC0350 - ACKN. FEEDBACK SWITCH ON TOO LONG **

ACKN. FEEDBACK SWITCH ON TOO LONG **

This alarm indicates that the acknowledgment feedback switch remained active for an excessively long duration during axis braking operations. The brake control circuit detected prolonged feedback signal presence, suggesting either a mechanical brake issue or an electrical control signal malfunction in the brake acknowledgment circuit.

Common Causes

  • Brake solenoid coil failure or incomplete de-energization
  • Stuck or worn brake mechanical components preventing proper release
  • Contaminated or damaged brake feedback switch contacts
  • Defective brake control relay or contactor in the power cabinet
  • Wiring short circuit or loose connections in the brake acknowledgment circuit
  • Excessive load on the axis exceeding braking capacity during motion

Troubleshooting Steps

  1. 1Verify axis load is within specification and not jammed or obstructed during braking sequence
  2. 2Inspect brake solenoid coil resistance using ohmmeter against manufacturer specifications
  3. 3Check brake feedback switch continuity and clean contacts if contamination is visible
  4. 4Verify all brake circuit wiring connections in the power cabinet are tight and undamaged
  5. 5Test brake relay/contactor operation and measure brake control voltage supply with multimeter
  6. 6Perform axis homing cycle and brake function test; if alarm persists, replace brake unit and retest

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