The trailer is a 1993 Shasta. No heat, just a/c.It is hard to believe I am the only one with a 10 wire setup.
Hi,
I searched for some more information, but I cannot find a manual or service manual for model 58915 306. However, I found a used rooftop model, 58915.305, which is a very old unit. I'm unsure of the difference between the .305 and the .306, but I suspect there is not much difference to try and help you.
This dealer is selling a used AC unit, and it has a 10-wire ribbon cable connection, and the rooftop unit control box is very large compared to the 579 series that many of the Sunline campers use.
Does your roof unit look like this? There are many good pics of the unit.
https://youngfartsrvparts.ca/produc...ioner-head-unit-58915-305-13500-btu-cool-only
If that is your unit, it helps us know more about what you have.
If you cannot get the older controls to work or get parts, I may have an option if you can get 12 VDC up to the AC unit. You do not need a lot of 12 VDC, 1 -2 amps will work. A picture inside the control box would be helpful so we can see what you have to work with. And there may be a wiring diagram on the inside of the cover, which can also help. That old system most likely had a power transformer inside the control box to create its own voltage source to run the T stat.
If the compressor and fan are still operating and you have electrical skills, you can change the control system to a more modern control box and capacitance touch T stat with parts available. I have done this twice when the parts are no longer available on the 579 series AC units, using Dometic 3316230.700 Control Kit/Relay Box Heat/Cool with Polar White CT Wall Thermostat. The control box applies power to the compressor and fan from the T stat, and it has a frost control feature. You only need three wires from the control box to the T stat; since you have 10 wires, you would only need 3 of them. If we can see inside your control box, we can see if this option will work. This option would be about $140 plus tax. here is one seller.
https://www.amazon.com/Dometic-Air-Conditioners-3316230-700-Thermostat/dp/B086RQ5LNM
Hope this helps,
John