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FANUC Alarm PNT1-123 — Battery Low

FANUC PNT1-123 (“Battery Low”): The battery in the PSU or encoder is low or zero. First check: Replace the old battery with a new battery. Likely part: Backup battery (Backup battery).

Updated 2026-09-17 · LogrobotLM reference

Description

The battery in the PSU or encoder is low or zero.

Remedy

Replace the old battery with a new battery.

Part to check / replace

FANUC PNT1-123 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

PNT1-121Collision Detection (Hand Broke)PNT1-122TP disabled during Test CyclePNT1-124CE switch must be in AUTOPNT1-125Operation mode AUTO Selected

Same hardware involved

PAIN-164Backup 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 →