TK Super II- Code 109

[bowhunter24]

I am having problems with a Super II coding out on high discharge pressure (code 109) when the host unit is in cool and the rear evaporator is in heat. The transducer is reading properly. Is there a valve sticking open possibly? Any suggestions would be appreciated.

[MRW]

Check the hot gas solenoid on the rear zone,
possible that stuck shut or not powering up

[tkjimmy]

if this unit is a tci then its possible the liquid return check valve in zone 2 is sticking
see if you have this problem with z2 in defrost if so i would check z2 hotgas soleniod valve

[TX Valve]

the rear unit is designed to operate between 35 degrees F and 55 degrees F If rear box temps are above this range , the rear evap is not moving enough air accross it to cool the gas and the unit will develope high heah pressure

Also it would be a good Idea to confirm Throttle valve setting around 28PSI , ( IN heat mode ) Good luck!

[abbsnowman]

Good reply TXV! Good to see a fellow Canuck here. Send me a pm at mark@futureclimates.ca and I will give you some good info.