Code Z52-00xy: Battery fault
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Battery fault 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 Battery voltage of the NC unit or the graphic control unit has dropped. (The battery for retaining internal data) x: Graphic control unit y: NC unit 1: Battery warning 2: Battery detect ing circuit error 3: Battery alarm (Note) The message "Battery warning" disappears on NC reset, but the warning status remains until exchange of the battery. Remedy Replace the battery of the NC unit or the graphic control unit. Check for any disconnection of the battery cable. After fixing the battery's fault, check the machining program.
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 Z52-00xy 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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