Assuming you have a CTL92 digital controller installed, the fault code is being reported in relation to the controller or the CAD62 adaptor. The TDR90 has an analogue connection to the CAD62 and doesn't generate fault codes. If you PM me I can get my diagnostic cards on Monday and send you the list. If you have the PROLINE 11 install manual, the codes are in the 'Operation' section at the back of the manual.