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 →

FANUC Alarm PNT1-788 — Pump 1 zero fluid flow rate detected

Manufacturer wording — %sPump 1 zero fluid flow rate detected
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC PNT1-788 (“Pump 1 zero fluid flow rate detected”): Zero fluid flow out of pump #1 is detected. First check: Check the mechanical coupling between the motor and the pump.

Updated 2026-09-17 · LogrobotLM reference

Description

Zero fluid flow out of pump #1 is detected. This condition is usually caused by one or more of the following:

Remedy

Check the mechanical coupling between the motor and the pump. Make sure the line from pump to trigger is ok.

Related codes

PNT1-786Pump 1 fluid flow rate > set pointPNT1-787Pump 1 fluid flow rate < set pointPNT1-789Pump 1 motor velocity limitPNT1-790Pump 1 motor servo not ready

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 →