LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm APSH-166 — WARN Studgun Change Unsuccessful

FANUC APSH-166 (“WARN Studgun Change Unsuccessful”): The robot was aborted or interrupted during the studgun change sequence. First check: Manually change the stud guns and move the robot to the home position.

Updated 2026-08-29 · LogrobotLM reference

Description

The robot was aborted or interrupted during the studgun change sequence.

Remedy · Remède

Manually change the stud guns and move the robot to the home position. Press cycle start to run production.

Frequently asked · Questions fréquentes

What does FANUC alarm APSH-166 mean?
FANUC APSH-166 (“WARN Studgun Change Unsuccessful”): The robot was aborted or interrupted during the studgun change sequence.
How do you troubleshoot FANUC alarm APSH-166?
Manually change the stud guns and move the robot to the home position. Press cycle start to run production.

Related codes / Codes liés

APSH-164WARN Home I/O program %s not loadedAPSH-165WARN Invalid Studgun SelectionAPSH-167WARN Move robot home & cycle startAPSH-168WARN No GO for EQP pressure

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →