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KUKA Error KSS01146 — Motor / axis brake / servo drive

Info

KUKA KSS01146 (“Motor / axis brake / servo drive”): “Motor blocked (A#)”: the motor is receiving current but barely turns; the controller concludes that it is blocked. Likely part: Motor brake (Motor brake) +2 more.

Updated 2026-09-09 · LogrobotLM reference

Cause

“Motor blocked (A#)”: the motor is receiving current but barely turns; the controller concludes that it is blocked. Often a brake that stays engaged (on some product ranges several brakes share the same circuit), an overload, a mechanical end stop, or an interrupted brake circuit.

Part to check / replace

KUKA KSS01146 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

KSS00126Servo drive (KSD/KSP) + mechanical drive train of the axisKSS00276Machine data vs hardware (RDC/EDS, disk)KSS00364Mode selector / 27 V power supply of the PC (KPC) / CIBKSS01305KSP servo drive / DC link (KPP power supply)

Same hardware involved

KSS15073Servo drive unitKSS26158Servo drive unit1528Motor brakeKSS15047Motor brake

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →