Code 440: EIA/ISO PROGRAM DESIGNATED
Issue Description & Safety Warning
The Mazak Mazatrol Matrix CNC has triggered a critical EIA/ISO PROGRAM DESIGNATED alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Type of error: A — Operation (a wrong key was pressed or the machine was operated incorrectly) Stopped status: L — Operation continued Clearing procedure: S — Press clear key Display colour: Blue Cause: 1. The machining program that has been designated on the TOOL LAYOUT, PROCESS CONTROL or SET UP RECORD display is an EIA/ISO program. 2. An EIA/ISO program has been designated for copying purposes during MAZATROL program editing. 3. An EIA/ISO program has been designated as the source program of EIA/ISO conversion. 4. An EIA/ISO program has been designated when writing coordinate values on the MEASURE display. Action: No EIA/ISO programs can be designated for operation on the TOOL LAYOUT, PROCESS CONTROL, SET UP RECORD or MEASURE display or during EIA/ISO conversion or MAZATROL program editing.
Source: Mazak Mazatrol Matrix — Parameter List, M-Codes, Alarm Manual (Section 3 Alarm)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mazak Mazatrol Matrix CNC Alarms
Mazak controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 440 on the Mazatrol Matrix CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mazak's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 714 Mazak Mazatrol Matrix CNC codes.
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