Code T01-0147: Mach. interrupt non-startable
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Mach. interrupt non-startable 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
Details Machining interruption related fu nctions cannot be started up. Remedy To resume the operation from the state of being st opped at the selected point, set the automatic operation mode to the memory mode. To perform the retraction, confirm that retraction is enabled (the "Retraction executable" signal is ON). To resume the operation from the state of being stopped at a certain block of the retraction program, acti- vate the memory mode and turn ON the "Retraction start" signal. Check the sequence program to make sure that multip le start signals are not input at the same time. (Note) The remedies stated above apply not only to retr action but also to the other machining interruption-re- lated functions. (The start signals and ready st ates are replaced with th ose for each function.)
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code T01-0147 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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