Mitsubishi Electric 600M Series Error PR0990: Illegal process

CNC milling machine · taken from the manufacturer’s manual, pages cited

Error codePR0990

An error occurred during the program analysis process, and it became impossible to continue. The manual's first action is: “Call the service center with as many details about the operation status as possible.”

Model
Mitsubishi Electric 600M Series
Display shows
Illegal process (PR0990)
Type
Error code
Source
Manual p. 489

What PR0990 means

Illegal process p. 489

Common causes

  • An error occurred during the program analysis process, and it became impossible to continue. p. 489

What to do

  1. Call the service center with as many details about the operation status as possible. p. 489

Before you service the product, read the safety instructions in the manual p. 4.

If PR0990 is still not resolved

  • contact service / dealer p. 5
    “Do not change the fixed cycle program without prior consent from the machine manufacturer.”
  • contact service / dealer p. 5
    “Do not turn OFF the NC a”
Open the manual at page 489 All 600M Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about PR0990; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.