LogrobotLM

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FANUC Alarm SRVO-349 — DCS MCC ON alarm %x,%x

FANUC SRVO-349 (“DCS MCC ON alarm %x,%x”): A command was issued to turn on the magnetic contactor, but the magnetic contactor was not turned on. First check: 1. Replace the E-stop unit. Likely part: Servo amplifier (Servo amplifier) +2 more.

Updated 2026-08-29 · LogrobotLM reference

Description

A command was issued to turn on the magnetic contactor, but the magnetic contactor was not turned on.

Remedy · Remède

1. Replace the E-stop unit. 2. Replace the panel board. 3. Replace the servo amplifier.

Part to check / replace · Pièce à contrôler / remplacer

FANUC SRVO-349 points to the hardware below — start here before ordering. · SRVO-349 met en cause l'organe ci-dessous : commencez par là.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering. · Touchez une pièce pour tous les codes qui la citent ; vérifiez la variante exacte avant commande.

Frequently asked · Questions fréquentes

What does FANUC alarm SRVO-349 mean?
FANUC SRVO-349 (“DCS MCC ON alarm %x,%x”): A command was issued to turn on the magnetic contactor, but the magnetic contactor was not turned on.
How do you troubleshoot FANUC alarm SRVO-349?
1. Replace the E-stop unit. 2. Replace the panel board. 3. Replace the servo amplifier.
Which part is involved in FANUC SRVO-349?
SRVO-349 points to Servo amplifier (Servo amplifier), E-stop unit (E-stop unit), Panel board (Operator panel board). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

SRVO-347DCS AXS alarm(G%d,A%d) %x,%xSRVO-348DCS MCC OFF alarm %x,%xSRVO-350DCS CPU alarm %x,%xSRVO-351DCS CRC alarm %x,%x

Same hardware involved / Même matériel en cause

SRVO-021E-stop unitSRVO-134E-stop unitSRVO-136E-stop unitSRVO-254E-stop unit

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 →