Code 700939: Tool data spindle missing (manual tool change: move tool changer up/down)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Tool data spindle missing (manual tool change: move tool changer up/down) 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
The tool changing procedure was interrupted during resaving of tool data. (Reset, Emergency Stop etc.) Resaving of tool data was thus not realised correctly. The tool is in the spindle, but the associated tool data is missing. Error message is displayed. 1. Switch to manual mode. 2. Press the [MANUAL TOOL CHANGE] key. Re-store the tool data. Error messages Tool management Tool data spindle missing (manual tool change: move tool changer up/down) 3. Move the tool changer down with the [TC up/down] key. The message Tool live management error (Siemens) appears. 4. Press [RESET] key. Message is cleared. 5. Move the tool changer up with the [TC up/down] key. Tool data is re-stored again and the message is cleared.
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 700939 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.
Have a better solution?
Help the industrial community by sharing your repair experience for code 700939.
Need a searchable reference for more Chiron Siemens-Control CNC manuals?
We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.
Space reserved for Google AdSense / Industrial Affiliate Links
Monetization target for 2026