Code 700401: Switch off main switch (coupling triggered)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Switch off main switch (coupling triggered) 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
Eliminate the message 700432 RE-APPROACH Z-AXIS HOME POSITION (CLUTCH RELEASED) 1. Switch off the control with the [Control OFF] key. 2. Switch off the machine with [Main switch OFF] (Brief waiting time) 3. Switch on the machine with [Main switch ON] 4. Switch on the control with the [Control ON] key. CAUTION! Just to make sure, the zero point of the Z-axis should be checked again.
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 700401 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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