FANUC Alarm SRVO-147 — SERVO LVAL(DCLK) alarm
Manufacturer wording — SERVO LVAL(DCLK) alarm (G:%d A:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC SRVO-147 (“SERVO LVAL(DCLK) alarm”): This alarm indicates a problem with the back-up charge circuit for the amplifier. First check: 1. Check the cable between the servo amplifier (CN1) and the MCC. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-09-17 · LogrobotLM reference
Description
This alarm indicates a problem with the back-up charge circuit for the amplifier.
Remedy
1. Check the cable between the servo amplifier (CN1) and the MCC. Replace it if necessary. 2. For a model using the B cabinet, check whether the transformer fuses (F1 and F3) have blown. 3. Replace the printed circuit board for emergency stop control. 4. Replace the servo amplifier.
Part to check / replace
FANUC SRVO-147 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 →