Code S53-164: Safety Function Warnings
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Safety Function Warnings 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
No compensation No. (DOO, TOO or HOO) command was given when the radius compensation (G41, G42, G43 or G46) command was iss ued. Otherwise, the compensation No. is larger than the number of sets in the specifications. H99 or D99 is commanded with the parameter "#1227 aux11/bit1" enabled when the length compensation method and radius compensation method are set to "1 " or "2" for the M system tool life management II. Remedy Add the compensation No. command to the compensation command block. Check the number of sets for the tool compensation Nos. and correct the compensation No. command to be within the number of sets. H99 and D99 commands cannot be used when the leng th compensation method and radius compensation are set to "1" or "2". Set the length compensat ion method and radius compensation method to "0". No spec:Comp input by prog G10
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 S53-164 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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