FANUC Alarm SRVO-047 — SERVO LVAL alarm(Group:%d Axis:%d)
FANUC SRVO-047 (“SERVO LVAL alarm(Group:%d Axis:%d)”): Despite the external magnetic contactor for a servo amplifier being on, the DC voltage (DC link voltage) of the main circuit power supply or the control power supply voltage (+5 V) is excessively low. First check: When the LED indicator on the servo amplifier displays '6' (this alarm is issued when the control power supply voltage (+5 V) is excessively low): 1. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-08-29 · LogrobotLM reference
Description
Despite the external magnetic contactor for a servo amplifier being on, the DC voltage (DC link voltage) of the main circuit power supply or the control power supply voltage (+5 V) is excessively low.
Remedy · Remède
When the LED indicator on the servo amplifier displays '6' (this alarm is issued when the control power supply voltage (+5 V) is excessively low): 1. Replace the servo amplifier. 2. Replace the power supply PCB.
Part to check / replace · Pièce à contrôler / remplacer
FANUC SRVO-047 points to the hardware below — start here before ordering. · SRVO-047 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-047 mean?
- FANUC SRVO-047 (“SERVO LVAL alarm(Group:%d Axis:%d)”): Despite the external magnetic contactor for a servo amplifier being on, the DC voltage (DC link voltage) of the main circuit power supply or the control power supply voltage (+5 V) is excessively low.
- How do you troubleshoot FANUC alarm SRVO-047?
- When the LED indicator on the servo amplifier displays '6' (this alarm is issued when the control power supply voltage (+5 V) is excessively low): 1. Replace the servo amplifier. 2. Replace the power supply PCB.
- Which part is involved in FANUC SRVO-047?
- SRVO-047 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 →