Truma CP not recognizing the water heater

[Olive2Roam]

Hey folks, Here's the skinny. 2024, LE I with Truma AC, Furnace and on demand HW heater. Until today, my control panel was recognizing the furnace and the water heater, but not the AC. I did a reset per the Truma manufacturer's manual, and now, the control panel sees the furnace AND the AC, but NOT the hot water heater. Switch is on on the HW heater and we are on shore power here at home (120). 

Looks like my best option at the moment is a trip back to the mother ship (scheduled for Monday) unless I can sort this out.

Any thoughts?

P.S. Enjoyed meeting many of you at the Lake Guntersville rally!

[Olive2Roam]

I should have mentioned that the good news is that the hot water is working just fine even though it is not connected to the control panel. So not the end of the world, but would like to get it connected. By the way, I spoke with both Truma and Oliver service about it and we were unable to come up with a solution. 

[topgun2]

Bob & Barb - 

I don't really know anything about Truma products - but - 

If it were mine, I'd unplug and re-plug any of the "control" wiring that you can find.  Next, I would turn everything off for at least a minute so that any "memory" functions have a chance to clear (note by "turn off" I mean that these units should have no source of power.  So, I would disconnect from shore power and make sure that all breakers are off).  Finally, I'd turn things back on and (once again) do the Reset as per the Truma instructions.

Hopefully this would "cure" any electron malfunction that may be present.

Bill

[Olive2Roam]

Good suggestion, Bill. I will give that a shot and report back tomorrow. 

Bob