08-17-18, 03:57 PM
I have an old AH4000 Wheel Drive autopilot which has served now 26 years. In later years it has suddenly switched to stand by and now the last year it totally stopped to work after a while. However, after a day or more it starts to work again for a while! I have checked all wire connections and have not find any failures. I believe that the control unit has now fulfilled its duty and needs to be replaced. The old unit is not anymore available to buy and thus I have thought to upgrade it to a newer one. The drive unit itself seems still to be ok. I would not like to spend money to buy a completely new system so I wonder if the newer Raymarine control units are compatible with the old AH4000 wheel drive unit?