KUKA Error 1528 — BRAKES RELEASED DURING CALIBRATION
ErrorDisplayed as KSS01528 on KRC4 / KRC5 controllers
KUKA 1528 (“BRAKES RELEASED DURING CALIBRATION”): A brake is still open from the previous motion. First check: Wait until all the brakes are closed and the servo enable is inhibited. Likely part: Motor brake (Motor brake).
Updated 2026-09-09 · LogrobotLM reference
Cause
A brake is still open from the previous motion.
Effect
Stop via braking ramp. All active commands are inhibited.
Troubleshooting
Wait until all the brakes are closed and the servo enable is inhibited.
Part to check / replace
KUKA 1528 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
Same hardware involved
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 →