FANUC Alarm SRVO-251 — DB relay abnormal(G:%d A:%d)
FANUC SRVO-251 (“DB relay abnormal(G:%d A:%d)”): The dynamic brake relay in the amplifier is abnormal. First check: Replace the amplifier. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-08-29 · LogrobotLM reference
Description
The dynamic brake relay in the amplifier is abnormal.
Remedy · Remède
Replace the amplifier.
Part to check / replace · Pièce à contrôler / remplacer
FANUC SRVO-251 points to the hardware below — start here before ordering. · SRVO-251 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-251 mean?
- FANUC SRVO-251 (“DB relay abnormal(G:%d A:%d)”): The dynamic brake relay in the amplifier is abnormal.
- How do you troubleshoot FANUC alarm SRVO-251?
- Replace the amplifier.
- Which part is involved in FANUC SRVO-251?
- SRVO-251 points to Servo amplifier (Servo amplifier). Confirm the real cause against the robot backup before replacing a part.
Related codes / Codes liés
Same hardware involved / Même matériel en cause
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 →