Originally Posted by 007";2142523]Did they use the same control from the old AC into the new one or did they have a new control in the new AC?
Did they set the dip switch's correctly? Figure 8 page 5.
They should not have done anything to the other two AC control boards, they were already set up.
Here is the [B][URL="http://bryantrv.com/docs2/docs/ccc5.pdf
5 button control system[/URL][/B] you probably have and here is the new system
in the newer motor homes now.
Its a possibility the new AC has the new system control board and its not compatible with the old 5 button system and all they need is the control board from your old 5 button system AC to put in the new AC.
Than again maybe you didn't need a new AC and only needed a new control board for you old AC.
007 I was hoping you might check in. I'll try to answer your questions so here goes,
1. Dometic spec'ed the new unit out with a new control board.
2. DIP Switches; this may be the rub, the old unit had 8 and supposedly the new one has 10, I didn't see it first hand. All the switches match, and the extra 2 switches are off.
3. They never took the covers off the other 2 units, but they think it's an issue with the communication line that connects the #2 to the #3 unit.
4. Thermostat; I personally reset the thermostat. At first the thermostat showed there was a zone 2 & 3, after the reset it didn't even register there was a zone 2 or 3.
5. Control board; now that's something no one has thought of. But I know the problem with the old unit wasn't the control board. Before the compressor eventually seized the #2 unit was drawing more and more power and then the whole thing just made a clicking sound and stopped working.
Hope these answers will help.