Code 510120: Max. chip conveyor coolant level
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Max. chip conveyor coolant level 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
Float switch "Coolant level chip conveyor MAX." signals maximum (signal state = 0). The switch is evaluated with a delay time (T40). The coolant tank has been overfilled. The PLC input signal "Coolant level chip conveyor MAX." is not registered.. Feed STOP and Spindle STOP The 1st coolant pump, the 2nd coolant pump, bed rinsing and the rinsing pump are switched off immediately. 1. Check the coolant level in the chip conveyor. 2. Check the actuation of the lifting pump (see note). 3. Check the float switch "Coolant level chip conveyor MAX" and the PLC input signal. 4. As soon as the malfunction is remedied, press one of the following keys: [FEED START] [CYCLE START] Message is cleared. Coolant level in the dirty water tank rises as soon as the lifting pump can no longer pump the accumulating coolant. Possible cause: The throttling in the lifting pipe is not set correctly. As soon as the float switch "coolant level in filter drum MIN” of the “VRF system” indicates “minimum", the vacuum pump is turned off. This means that coolant is running back into the dirty water tank and the level is increasing. In this case, also check the float switch "Coolant level filter drum MIN."
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 510120 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 510120.
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