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FANUC Alarm SPOT-173 — PAUSE Backup open fault %s-gun 2

FANUC SPOT-173 (“PAUSE Backup open fault %s-gun 2”): The BU Open Detect input was not received within the specified timeout period. First check: Verify the input is assigned correctly; verify the input is being made when the backup gun is opened; or if needed, increase the timeout value (in $spoteqsetup.$bu_op_to).

Updated 2026-08-29 · LogrobotLM reference

Description

The BU Open Detect input was not received within the specified timeout period.

Remedy · Remède

Verify the input is assigned correctly; verify the input is being made when the backup gun is opened; or if needed, increase the timeout value (in $spoteqsetup.$bu_op_to).

Frequently asked · Questions fréquentes

What does FANUC alarm SPOT-173 mean?
FANUC SPOT-173 (“PAUSE Backup open fault %s-gun 2”): The BU Open Detect input was not received within the specified timeout period.
How do you troubleshoot FANUC alarm SPOT-173?
Verify the input is assigned correctly; verify the input is being made when the backup gun is opened; or if needed, increase the timeout value (in $spoteqsetup.$bu_op_to).

Related codes / Codes liés

SPOT-171PAUSE Gun open fault %s-gun 2SPOT-172PAUSE Gun close fault %s-gun 2SPOT-174PAUSE Backup close fault %s-gun 2SPOT-190PAUSE Bad Pressure (EP=%s)-gun 2

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 →