Code 701551: Oil/air lubrication > Operating pressure (air) not present (spindle 2)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Oil/air lubrication > Operating pressure (air) not present (spindle 2) 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
"Oil/air lubrication, air operating pressure valve on" was actuated, but there was no response from the "Oil/air lubrication, air operating pressure available (SP2)" pressure switch within 5 seconds. Feed Stop and Spindle Stop "Oil/air lubrication, air operating pressure valve on" is switched off again. "Oil/air lubrication, unit on" is switched off. "Oil/air lubrication, vacuum suction nozzle valve on" is switched off with a run-on time of 10 minutes. 1. Check the actuation of the "Oil/air lubrication, air operating pressure valve on" valve. 2. Check the PLC input signal and the sensor "Oil/air lubrication, air operating pressure available (SP2)". 3. As soon as the malfunction is remedied, press one of the following keys: [FEED START] [CYCLE START] [RESET] Message is cleared. The menu can be found under: Chapter 2.6 ‘Oil/air lubrication’ on page 12
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 701551 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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