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 FXTL-166 — Cannot switch program.

FANUC FXTL-166 (“Cannot switch program.”): Cannot change model program First check: Move the units to the first or last step of the model program before switching.

Updated 2026-08-29 · LogrobotLM reference

Description

Cannot change model program

Remedy · Remède

Move the units to the first or last step of the model program before switching.

Frequently asked · Questions fréquentes

What does FANUC alarm FXTL-166 mean?
FANUC FXTL-166 (“Cannot switch program.”): Cannot change model program
How do you troubleshoot FANUC alarm FXTL-166?
Move the units to the first or last step of the model program before switching.

Related codes / Codes liés

FXTL-164Invalid shim data.FXTL-165Zero shim data.FXTL-167No unit selected.FXTL-168Jog keys are disabled.

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 →