Code 701755: Protective doors not released
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Protective doors not released 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
"Unlock right protective door" is pending, but the secure input signals "Right protective door closed and locked" are still registered. It is not possible to open the protective door. 1. Check the PLC output signal. 2. Check the mechanical locking magnet of the right protective door (possibly plunger or tongue jammed).
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 701755 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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