Code 700151: Coolant not selected
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Coolant not selected 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
During the machining a coolant requirement ( M8, M7 or M171 M177 ) was programmed, but the coolant on the machine is not switched on. Feed Stop 1. Switch on coolant on the machine with the [COOLANT ON] key. 2. Press one of the following keys: [CYCLE START] Message is cleared. 3. If the coolant is not switched on, press one of the following keys: [FEED START] [CYCLE START] Machining can be continued up to the next coolant request.
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 700151 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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