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FANUC Alarm MHND-259 — PAUSE %s vacuum is not off

FANUC MHND-259 (“PAUSE %s vacuum is not off”): The vacuum switch is still detecting vacuum. First check: Check if all the clamps have completely closed.

Updated 2026-08-29 · LogrobotLM reference

Description

The vacuum switch is still detecting vacuum.

Remedy · Remède

Check if all the clamps have completely closed.

Frequently asked · Questions fréquentes

What does FANUC alarm MHND-259 mean?
FANUC MHND-259 (“PAUSE %s vacuum is not off”): The vacuum switch is still detecting vacuum.
How do you troubleshoot FANUC alarm MHND-259?
Check if all the clamps have completely closed.

Related codes / Codes liés

MHND-257PAUSE Clamp %s state errorMHND-258PAUSE %s did not make vacuumMHND-260ABORT Parm %s is not between 1-10MHND-261WARN ERRORS: Check FR:GRERRORS.LS

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →