[CA] [CA11] Updating EV-1, ACU-200, P70 Software

[Chuck - Raymarine - Moderator]

Welcome back to the Raymarine Forum Denis+Ellis,

You may have indeed identified the source of the issue, as indeed the EV-1 CCU's LED should be illuminated. Autopilot control heads are powered by the backbone ... they do snot supply power a backbone. Some autopilot course computers and some ACUs are designed to supply power to a backbone. While it is considered to be a best installation practice to power the backbone via a SeaTalkng Power Cable which has been powered from a dedicated switched 12VDC power circuit, within small system (i.e. those featuring simply a MFD and an Evolution autopilot), some will elect to power the backbone from the ACU. A dip switch is provided on interface panel of the ACU-200 and ACU-400 to switch power on/off from the ACU. In this case I suspect that you will find that either the ACU is not powered ON or the circuit which is responsible for supplying power to the SeaTalkng Power Cable is switched off.