LogrobotLM

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FANUC Alarm ARC-166 — STOP Comm . stopped in weld(E:%d)

FANUC ARC-166 (“STOP Comm . stopped in weld(E:%d)”): Communication with RoboWeld power source stopped in welding. First check: Confirm another error message and port, cable setup.

Updated 2026-08-29 · LogrobotLM reference

Description

Communication with RoboWeld power source stopped in welding.

Remedy · Remède

Confirm another error message and port, cable setup.

Frequently asked · Questions fréquentes

What does FANUC alarm ARC-166 mean?
FANUC ARC-166 (“STOP Comm . stopped in weld(E:%d)”): Communication with RoboWeld power source stopped in welding.
How do you troubleshoot FANUC alarm ARC-166?
Confirm another error message and port, cable setup.

Related codes / Codes liés

ARC-164STOP Power source error(E:%d)ARC-165STOP EQ is detached(E:%d)ARC-167SYSTEM I/O asginment overlap(%d)(E:%d)ARC-168SYSTEM I/O error(%d)(%d, E:%d)

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 →