Code 700022: PLC-MD wrong (cooling unit 1)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical PLC-MD wrong (cooling unit 1) 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
This error message appears when the PLC machine parameter (Without monitoring cooling unit 1) is set to 1, but a PLC input of the cooling unit is registered. Error messages Cooling lubrication PLC-MD wrong (cooling unit 1) The error has the following effect: Feed Stop No axis movements possible. "Spindle Stop" Tool spindle is stopped. Speed no longer possible. 1. Correct PLC machine parameter. (With cooling unit = 0, without cooling unit = 1) 2. Check the following PLC inputs: Malfunction cooling unit 1 Flow monitor cooling unit 1 Cooling unit temperature monitoring 1 3. Message can only be acknowledged with [Control OFF] and then [Control ON] again. PLC machine parameter may only be set when the system doesn't have a cooling unit. If the PLC machine parameter is set to 1 (without monitoring), no input from the cooling unit may be registered.
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 700022 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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