LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm PNT1-646 — %sFlow rate avg. error excessive

FANUC PNT1-646 (“%sFlow rate avg. error excessive”): Comparisons of how far the measured flow rate is from the setpoint had too large of a result. First check: Check, clean, and possibly replace the air cap. Likely part: Transducer (Transducer) +1 more.

Updated 2026-08-29 · LogrobotLM reference

Description

Comparisons of how far the measured flow rate is from the setpoint had too large of a result. The size of the error between measured flow and setpoint that will cause this alarm is controlled by the Max. error from setpoint parameter. Possible causes are:

Remedy · Remède

Check, clean, and possibly replace the air cap. Check for oscillating air pressure on the output of the I/P transducer. If found, replace the transducer. Check for a large loss of air supply pressure or pinched air lines. If the alarm occurs on both Fan Air and Atomizing Air or many robots, then possibly increase the Max. error from setpoint parameter.

Part to check / replace · Pièce à contrôler / remplacer

FANUC PNT1-646 points to the hardware below — start here before ordering. · PNT1-646 met en cause l'organe ci-dessous : commencez par là.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering. · Touchez une pièce pour tous les codes qui la citent ; vérifiez la variante exacte avant commande.

Frequently asked · Questions fréquentes

What does FANUC alarm PNT1-646 mean?
FANUC PNT1-646 (“%sFlow rate avg. error excessive”): Comparisons of how far the measured flow rate is from the setpoint had too large of a result. The size of the error between measured flow and setpoint that will cause this alarm is controlled by the Max. error from setpoint parameter. Possible causes are:
How do you troubleshoot FANUC alarm PNT1-646?
Check, clean, and possibly replace the air cap. Check for oscillating air pressure on the output of the I/P transducer. If found, replace the transducer. Check for a large loss of air supply pressure or pinched air lines. If the alarm occurs on both Fan Air and Atomizing Air or many robots, then possibly increase the…
Which part is involved in FANUC PNT1-646?
PNT1-646 points to Transducer (Transducer), Air cap (Air cap (paint atomizer)). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

PNT1-644%sCal. table adapted in tolerancePNT1-645%sDyn. yield > %% tolerance bandPNT1-647%sCalibration successfulPNT1-648%sCalibration aborted

Same hardware involved / Même matériel en cause

PAIN-500Air capPAIN-503Air capPAIN-510Air capPAIN-514Air cap

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →