FANUC Alarm PNT1-166 — Linear Potentiometer Unstable
FANUC PNT1-166 (“Linear Potentiometer Unstable”): During Auto Calibration, the feedback from the linear potentiometer revealed large fluctuations in the canister position over a short period of time. First check: Change the applicator and repair the malfunctioning linear potentiometer.
Updated 2026-09-17 · LogrobotLM reference
Description
During Auto Calibration, the feedback from the linear potentiometer revealed large fluctuations in the canister position over a short period of time. If the linear potentiometer has been improperly installed or the magnet has been misaligned, it might cause this alarm.
Remedy
Change the applicator and repair the malfunctioning linear potentiometer. Retry calibration with a different applicator.
Related codes
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 →