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FANUC Alarm PAIN-164 — WARN Battery Low

FANUC PAIN-164 (“WARN Battery Low”): Battery in PSU or encoder is low or zero. First check: Replace the Old Battery with a new battery of same kind. Likely part: Backup battery (Backup battery).

Updated 2026-09-17 · LogrobotLM reference

Description

Battery in PSU or encoder is low or zero.

Remedy

Replace the Old Battery with a new battery of same kind.

Part to check / replace

FANUC PAIN-164 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

PAIN-162ABRT Collision Detection (Hand Broke)PAIN-163PAUS TP disabled during Test CyclePAIN-165WARN CE switch must be in AUTOPAIN-166PAUS Operation mode AUTO Selected

Same hardware involved

PNT1-123Backup batterySRVO-065Backup batterySYST-035Backup battery

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 →