Dometic E1 code

After spending time dewinterizing our fiver, my last step was to fire up the furnace. That's when I noticed the digitsl display showing the code E1. Nothing would work, furnace, either one of the a/c units. After reading in the manual how to do a reset now the E1 code is gone and now instead of zones 1&2 there is zones 1 & 4. Where did zone 4 come from? The furnace or a/c units are still not working. Any ideas?