FANUC Alarm SRVO-146 — SERVO LVAL(INV-DC) alarm
Manufacturer wording — SERVO LVAL(INV-DC) alarm(G:%d A:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC SRVO-146 (“SERVO LVAL(INV-DC) alarm”): 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 2026-09-17 · LogrobotLM reference
Description
The DC voltage of the main circuit power supply is too low.
Remedy
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
FANUC SRVO-146 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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. How this reference is built →