KUKA Error 2226 — INCORRECT SIGN
Displayed as KSS02226 on KRC4 / KRC5 controllers
KUKA 2226 (“INCORRECT SIGN”): No sign is permissible at this point. First check: Modify the program.
Updated 2026-09-09 · LogrobotLM reference
Cause
No sign is permissible at this point.
Effect
The program cannot be executed.
Troubleshooting
Modify the program.
Related codes
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 →