Code 700108: Monitoring of clamping hydraulics filter
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Monitoring of clamping hydraulics filter 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 "Hydraulic filter monitoring“ pressure switch on the hydraulic unit has responded (signal state =0). The return pressure is too high. The oil filter is soiled. PLC input signal "Clamping hydraulics filter monitoring" is not registered. The error has the following effect as soon as the end of the machining program has been reached: Feed Stop No axis movements possible. "Spindle Stop" Tool spindle is stopped. Speed no longer possible. The hydraulic unit remains switched on. For MT series: Channel-specific "Feed Stop" and "Spindle Stop" after tool change on this channel. The other channel, respectively, continues to run until the next rapid feed ( G0 ). The hydraulic unit remains switched on. 1. Check the oil filter in the hydraulic unit. 2. Check the pressure switch and the PLC input signal "Clamping hydraulics filter monitoring". 3. As soon as the malfunction has been remedied, press the [FEED START] key. Message is cleared.
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 700108 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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