Code 700256: Spindle warm-up active: coolant medium / spindle bearings (please wait)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Spindle warm-up active: coolant medium / spindle bearings (please wait) 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 temperature of the coolant / spindle bearing is not yet within the permitted range. Error messages Tool spindle Spindle warm-up active: coolant medium / spindle bearings (please wait) The message appears as a tip. The warm-up continuous until the respective temperature is reached (at least 5 minutes). Feed Stop, as long as the spindle warm-up is running. Wait: the machine continues running automatically after the warmup is completed. The warm-up is interrupted and an error message appears if the temperature is not reached within 30 minutes.
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 700256 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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