FANUC Alarm PNT1-661 — Fast air flow leak detected
Manufacturer wording — %sFast air flow leak detected
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PNT1-661 (“Fast air flow leak detected”): A large amount of air flow was detected when the gun was not turned on. First check: The applicator and the various air lines should be inspected and repaired immediately.
Updated 2026-09-17 · LogrobotLM reference
Description
A large amount of air flow was detected when the gun was not turned on. This might be caused by a leaking trigger valve, leaking air line, broken air line, broken applicator, or any other air leak between the air flow sensor, and the gun.
Remedy
The applicator and the various air lines should be inspected and repaired immediately.
Related codes
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 →