Code 701862: Tool revolver unlocked
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Tool revolver unlocked 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
Message is displayed as soon as the revolver is unlocked in "Manual mode" or "Manual input" mode. Message is just for informational purposes and has no effect on the machine. Lock the revolver in "Manual mode" with the [TOOL CHANGER START] key. In "Manual input" mode, execute M88 M51. Error messages Tool revolver Tool revolver unlocked
Source: CHIRON Error Message Overview, all series (Siemens control, V2.0.6, 2012)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Chiron Siemens-Control CNC Alarms
Chiron controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 701862 on the Siemens-Control CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Chiron's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 545 Chiron Siemens-Control CNC codes.
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