Dometic Penguin ii HP upgraded

TonyCarri76 wrote:
I have a 1982 coachmen TT and the brisk air duo/therm finally went out on me last weekend. So I bought 2 used Dometic Penguin ii #651815c from my cousin for $100. I have hooked one up and i bypassed the fan and compressor to see if they work and the units work. Now here is the kicker these units have the 12 to 5 button board #3109229.009 . Now I have ran a 12dcv for the thermostat to power on and the unit is hooked up to the 115ac wiring, but the thermostat reads CODE EE and I held down the mode and zone buttons and powered the tstat on and I get FF but as soon as i let go of the 2 buttons it still reads EE. I connected the tstat directly to the board and still get the code. Can anyone help me out please

You DID use 4 wire phone type wire? The wire is called a Communication cable and you CANNOT use standard Phone cables. COM cables are wired in reverse to phone modular connections. Now, you CANNOT wire 12 volt to the tstat. You wire 12 volt to the 5 button board for the AC unit. THAT then supplies the needed power to the wall tstat. Doug

http://beamalarm.com/Documents/duo_therm_5_button_3109228.001_troubleshooting.html