LogrobotLM

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FANUC Alarm SRVO-146 — SERVO LVAL(INV-DC) alarm(G:%d A:%d)

FANUC SRVO-146 (“SERVO LVAL(INV-DC) alarm(G:%d A:%d)”): The DC voltage of the main circuit power supply is too low. First check: Check each interphase voltage of the three-phase voltage (200 VAC) applied to the servo amplifier. Likely part: Servo amplifier (Servo amplifier).

Updated 2026-08-29 · LogrobotLM reference

Description

The DC voltage of the main circuit power supply is too low.

Remedy · Remède

Check each interphase voltage of the three-phase voltage (200 VAC) applied to the servo amplifier. If the applied voltage is found to be 170 VAC or less, check the input power supply voltage. Replace the servo amplifier.

Part to check / replace · Pièce à contrôler / remplacer

FANUC SRVO-146 points to the hardware below — start here before ordering. · SRVO-146 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-146 mean?
FANUC SRVO-146 (“SERVO LVAL(INV-DC) alarm(G:%d A:%d)”): The DC voltage of the main circuit power supply is too low.
How do you troubleshoot FANUC alarm SRVO-146?
Check each interphase voltage of the three-phase voltage (200 VAC) applied to the servo amplifier. If the applied voltage is found to be 170 VAC or less, check the input power supply voltage. Replace the servo amplifier.
Which part is involved in FANUC SRVO-146?
SRVO-146 points to Servo amplifier (Servo amplifier). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

SRVO-144SERVO LVAL(INV) alarm (G:%d A:%d)SRVO-145SERVO LVAL(CNV-DC) alarm(G:%d A:%d)SRVO-147SERVO LVAL(DCLK) alarm (G:%d A:%d)SRVO-148SERVO HCAL(CNV) alarm (G:%d A:%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 →