Troubleshooting E5 Communication Error for Advent AC Converted From Analog to Digital Controller

Question:

I hooked the acrg15 to my ac150 that had acrg11 and all Im getting is e5 comm error

asked by: Shawn

Expert Reply:

According to my research you also need a Digital Relay Box part PXXACRG12RB to switch from the ACRG11 to the ACRG15. Since you don't have this installed there is a communication error between your Advent Air RV Air Conditioner # ACM150 and the thermostat, which makes sense if you don't have that relay box.

Unfortunately this box was discontinued earlier in April of 2023 so we don't have any more of them, but you might be able to find them elsewhere like at a used parts store.

If you aren't able to locate one of these boxes then you'll need a completely different setup since Advent doesn't have a replacement for that box as of yet. To replace your whole setup I recommend checking out the Furrion Chill HE RV Air Conditioner System # FR23PV which comes with the wiring, AC system, and thermostat to replace what you currently have,.

expert reply by: Jon G