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FANUC Alarm FRCE-161 — F/S timeout error (F:…)

Manufacturer wording — F/S timeout error (F:%d^1)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC FRCE-161 (“F/S timeout error (F:…)”): The force control board or the main control board has failed. First check: 1. Turn the controller OFF, then ON again. Likely part: Main board (Main CPU board) +1 more.

Updated 2026-09-17 · LogrobotLM reference

Description

The force control board or the main control board has failed.

Remedy

1. Turn the controller OFF, then ON again. If this alarm occurs again, go to the next step. 2. Replace the force control board. If this alarm occurs again, go to the next step. 3. Replace the main board.

Part to check / replace

FANUC FRCE-161 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

FRCE-159F/S sensor limit overflow (F:…)FRCE-160F/S cable is cut (F:…)FRCE-162F/S temperature data overflow (F:…)FRCE-163F/S watch dog error (F:…)

Same hardware involved

FRCE-215Force control boardSRVO-001Main boardSRVO-021Main boardSRVO-022Main board

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 →