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FANUC Alarm GUID-166 — SERVO Force sensor SIR1 SLC-2

FANUC GUID-166 (“SERVO Force sensor SIR1 SLC-2”): Force sensor SIR1 SLC-2 SLC-2, SLDM, or SLDS error. First check: Replace sensor head, interface board, and/or cable. Likely part: Sensor head (Sensor head).

Updated 2026-09-17 · LogrobotLM reference

Description

Force sensor SIR1 SLC-2 SLC-2, SLDM, or SLDS error.

Remedy

Replace sensor head, interface board, and/or cable.

Part to check / replace

FANUC GUID-166 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

GUID-164SERVO Force sensor shared parityGUID-165SERVO Force sensor local parityGUID-167SERVO Force sensor dist link commGUID-200WARN TCP Mate motion aborted.

Same hardware involved

FRCE-156Sensor headFRCE-158Sensor headFRCE-162Sensor headFRCE-163Sensor head

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 →