LogrobotLM

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FANUC Alarm SRVO-044 — SERVO HVAL alarm(Group:%d Axis:%d)

FANUC SRVO-044 (“SERVO HVAL alarm(Group:%d Axis:%d)”): The DC voltage (DC link voltage) of the main circuit power supply is abnormally high. First check: 1. Check the three-phase input voltage applied to the servo amplifier. Likely part: Servo amplifier (Servo amplifier).

Updated 2026-08-29 · LogrobotLM reference

Description

The DC voltage (DC link voltage) of the main circuit power supply is abnormally high. The LED indicator of the servo amplifier PSM displays '7'.

Remedy · Remède

1. Check the three-phase input voltage applied to the servo amplifier. When the voltage is 253 VAC or higher, check the input power supply voltage. If the motor is abruptly accelerated or decelerated while the three-phase input voltage exceeds 253 VAC, this alarm might be issued. 2. Check whether the applied load is within the rated value. If the rated load is exceeded, reduce the applied load. If a load exceeds the rated value, built-up regenerative energy might this alarm to be issued even when the three-phase input voltage satisfies the specifications. 3. Check the cables (CN3 and CN4) in the amplifier. Replace them if necessary. 4. Check the cable between the main CPU printed circuit board (JRV1) and the printed circuit board for the emergency stop control (JRV1). 5. Replace the servo amplifier.

Part to check / replace · Pièce à contrôler / remplacer

FANUC SRVO-044 points to the hardware below — start here before ordering. · SRVO-044 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-044 mean?
FANUC SRVO-044 (“SERVO HVAL alarm(Group:%d Axis:%d)”): The DC voltage (DC link voltage) of the main circuit power supply is abnormally high. The LED indicator of the servo amplifier PSM displays '7'.
How do you troubleshoot FANUC alarm SRVO-044?
1. Check the three-phase input voltage applied to the servo amplifier. When the voltage is 253 VAC or higher, check the input power supply voltage. If the motor is abruptly accelerated or decelerated while the three-phase input voltage exceeds 253 VAC, this alarm might be issued. 2. Check whether the applied load is…
Which part is involved in FANUC SRVO-044?
SRVO-044 points to Servo amplifier (Servo amplifier). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

SRVO-042SERVO MCAL alarm(Group:%d Axis:%d)SRVO-043SERVO DCAL alarm(Group:%d Axis:%d)SRVO-045SERVO HCAL alarm(Group:%d Axis:%d)SRVO-046SERVO OVC alarm (Group:%d Axis:%d)

Same hardware involved / Même matériel en cause

SRVO-018Servo amplifierSRVO-021Servo amplifierSRVO-022Servo amplifierSRVO-023Servo amplifier

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 →