KRC0650

Common Causes

• Physical safety gate/door left open or improperly closed
• Faulty or misaligned safety gate switch sensor
• Damaged or worn safety interlock contacts
• Safety fence door opened during robot operation or teach mode
• Wiring disconnection or short circuit in the safety fence circuit

Troubleshooting Steps

1. 1Stop all robot operations immediately and verify the safety fence gate 1604 is fully closed and properly latched
2. 2Inspect the physical condition of the safety gate for damage, misalignment, or obstructions preventing proper closure
3. 3Check the safety gate switch sensor (typically a proximity or mechanical switch) for proper alignment and operation
4. 4Use the teach pendant to manually test the safety gate sensor response while gate is opened and closed
5. 5Inspect all wiring connections to the safety fence interlock circuit for loose connectors, corrosion, or physical damage
6. 6Clear the alarm by closing the safety gate and performing a system reset; if alarm persists, contact KUKA service or replace the faulty safety sensor