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FANUC Alarm TPIF-003 — WARN Window I/O error

Manufacturer wording — WARN Window I/O error (%s^1)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC TPIF-003 (“WARN Window I/O error”): Illegal case occured on software. First check: Perform a cold start: 1.

Updated 2026-09-17 · LogrobotLM reference

Description

Illegal case occured on software.

Remedy

Perform a cold start: 1. Turn off the robot. 2. On the teach pendant, press and hold the SHIFT and RESET keys. 3. While still pressing the SHIFT and RESET keys, turn on the robot. If the error is not cleared, document the events that led to the error and call your FANUC Robotics technical representative.

Related codes

TPIF-001WARN Mnemonic editor errorTPIF-002WARN Operating system errorTPIF-004WARN Memory write errorTPIF-005WARN Program is not selected

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 →