FANUC Alarm PAIN-451 — WARN …0 fluid flow rate timeout
Manufacturer wording — WARN %s0 fluid flow rate timeout
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PAIN-451 (“WARN …0 fluid flow rate timeout”): All of the conditions were set for fluid to be flowing and a zero flow rate was measured for longer than the Zero flow timeout parameter. First check: Check that the gun is properly triggering. Likely part: Fluid flow meter (Fluid flow meter).
Updated 2026-09-17 · LogrobotLM reference
Description
All of the conditions were set for fluid to be flowing and a zero flow rate was measured for longer than the Zero flow timeout parameter. This may be caused by: a broken applicator trigger, a loss of fluid supply pressure, a broken fluid flow meter, a broken cable (to the flow meter), or a Zero flow timeout value that is too short. Note, AccuFlow temporarily automatically changes to Open Loop when this alarm occurs.
Remedy
Check that the gun is properly triggering. If fluid was observed to be flowing, check and possibly replace the fluid flow meter. Possibly increase the Zero flow timeout parameter (by about 25%).
Part to check / replace
FANUC PAIN-451 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
Same hardware involved
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 →