Code 235-00AA: Connected inverters do not match configuration
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Connected inverters do not match configuration 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
[Cause of error] On device %4 with the serial number %5 at HSCI address %3, the connected inverters do not match the configuration. The deviation is so large that the control cannot provided relevant information. Configuration [Type (port)]: %1 Hardware [Type (port, serial number)]: %2 Possible causes: - Option for configuring the hardware expansion was set incorrectly - Incorrect inverter connected [Error correction] - Check configuration and the options in effect - Check the connected inverters You can use the diagnostics functions of the control for this. 10/2023 [613]
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 235-00AA on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
Have a better solution?
Help the industrial community by sharing your repair experience for code 235-00AA.
Need a searchable reference for more Heidenhain TNC Series 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