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 PNT2-657 — %sMax. output has flow < setpoint

FANUC PNT2-657 (“%sMax. output has flow < setpoint”): With a maximum control output the flow rate was measured to be lower than the setpoint (requested flow). First check: Check, clean and possibly replace the air cap. Likely part: Air flow sensor (Air flow sensor) +1 more.

Updated 2026-08-29 · LogrobotLM reference

Description

With a maximum control output the flow rate was measured to be lower than the setpoint (requested flow). The Max. control out (ms) parameter effects the sensitivity of this alarm. This is likely caused by a clogged air cap. This may be caused by: pinched air lines, a broken I/P transducer or a broken air flow sensor. Note, AccuAir temporarily automatically changes to Open Loop when this alarm occurs.

Remedy · Remède

Check, clean and possibly replace the air cap. If air is observed to be flowing (when commanded), possibly replace the air flow sensor. Check for a pinched air line. Check and repair the I/P transducer. Possibly increase the Max. control out (ms) parameter (by about 50%).

Part to check / replace · Pièce à contrôler / remplacer

FANUC PNT2-657 points to the hardware below — start here before ordering. · PNT2-657 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 PNT2-657 mean?
FANUC PNT2-657 (“%sMax. output has flow < setpoint”): With a maximum control output the flow rate was measured to be lower than the setpoint (requested flow). The Max. control out (ms) parameter effects the sensitivity of this alarm. This is likely caused by a clogged air cap. This may be caused by: pinched air…
How do you troubleshoot FANUC alarm PNT2-657?
Check, clean and possibly replace the air cap. If air is observed to be flowing (when commanded), possibly replace the air flow sensor. Check for a pinched air line. Check and repair the I/P transducer. Possibly increase the Max. control out (ms) parameter (by about 50%).
Which part is involved in FANUC PNT2-657?
PNT2-657 points to Air flow sensor (Air flow sensor), Air cap (Air cap (paint atomizer)). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

PNT2-655%sTime out during a cal. testPNT2-656%sMin. output has flow > setpointPNT2-658%sFlow setpoint below globalsPNT2-659%sRequested flow above cal. table

Same hardware involved / Même matériel en cause

PAIN-510Air flow sensorPAIN-514Air flow sensorPAIN-520Air flow sensorPAIN-540Air flow sensor

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 →