I have a KM 450MAB giving me trouble which I can not figure out. On start-up, water valve opens for a minute, and then compressor starts - and it should be in harvest. Liquid line to TXV is real hot, hot gas line is not. Pressures = low - pegged, high side 350+ & shuts off on high head. I figured it was the hot gas solenoid. I can lift the coil off the solenoid, and it appears to be opening and closing, and I can hear the difference in sound, but no change on gauges.
I pulled the charge, pulled the solenoid and strainer. I energized the valve and blew through it - clear. Strainer was clear. Blew down the hot gas line with nitro, and seemed to get it back on low side. Hooked it back up, weighed the charge, same problem. Off on high head. What the heck am I missing?
called my Hoshi rep, and he said it's the coil, but how I don't know, cause it worked in my hand, and seemed to work installed. Hoshi factory - not much better - said maybe TXV, which doesn't make sense to me.
Help me please.
OK, OK, here's the deal, if you guys help me solve this, I'm gonna sign up to be a site supporter. This is driving me nuts.