Code P49-000: Invalid restart search
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Invalid restart search 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 Restart search was atte mpted for a block that comes after any of the following command blocks: 3-dimensional circular interpolation, cylindrical interpolation, polar coordinate interpolation, milling interpola- tion, tool center point control, simple tool center poin t control, inclined surface machining, simple inclined sur- face machining, workpiece installation error compensation, axis name switch, mixed control, machining condition selection I, sub part system control I, sub part system cont rol II, or direct command mode. Remedy Reconsider the restart search position.
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 P49-000 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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