What causes KUKA Robot alarm KRC0159?

Mode selector switch physically stuck or jammed between two positions. Worn or damaged mode selector switch contact points causing intermittent recognition. Faulty mode selector switch requiring replacement. Loose or corroded electrical connections to the mode selector switch. Controller firmware issue with mode switch input signal interpretation.

How do I fix KUKA Robot alarm KRC0159?

1. Visually inspect the mode selector switch on the teach pendant or controller cabinet for any obstructions and ensure it moves freely between all three positions (T1, T2, AUT) 2. Cycle the mode selector switch multiple times through all valid positions and verify the alarm clears 3. Check electrical connections and wiring harness to the mode selector switch for corrosion, loose contacts, or damage 4. Test the mode selector switch continuity and resistance values using a multimeter to verify proper electrical function 5. If the switch appears damaged or worn, replace the mode selector switch assembly following KUKA service documentation 6. Clear the alarm and restart the controller to confirm the issue is resolved; if the alarm persists, contact KUKA service support for potential controller diagnostics

KUKA Robot codes

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KUKA Robot Controller

System · Advanced

Alarm KRC0159

KUKA Robot KRC0159 - OPERATING MODE CHANGE

This alarm indicates that the mode selector switch on the KUKA KRC controller is positioned in an invalid or intermediate state that does not correspond to a defined operating mode. The controller cannot execute commands when the mode switch is not clearly set to one of the valid positions (T1, T2, or AUT). This typically occurs during mode transitions or when the switch becomes mechanically stuck between positions.

KUKA RobotSystemAdvanced

KRC0159

KUKA Robot KRC0159 - OPERATING MODE CHANGE

OPERATING MODE CHANGE

Common Causes

Mode selector switch physically stuck or jammed between two positions
Worn or damaged mode selector switch contact points causing intermittent recognition
Faulty mode selector switch requiring replacement
Loose or corroded electrical connections to the mode selector switch
Controller firmware issue with mode switch input signal interpretation

Troubleshooting Steps

1Visually inspect the mode selector switch on the teach pendant or controller cabinet for any obstructions and ensure it moves freely between all three positions (T1, T2, AUT)
2Cycle the mode selector switch multiple times through all valid positions and verify the alarm clears
3Check electrical connections and wiring harness to the mode selector switch for corrosion, loose contacts, or damage
4Test the mode selector switch continuity and resistance values using a multimeter to verify proper electrical function
5If the switch appears damaged or worn, replace the mode selector switch assembly following KUKA service documentation
6Clear the alarm and restart the controller to confirm the issue is resolved; if the alarm persists, contact KUKA service support for potential controller diagnostics

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