Thermoking evolution APU Issue

My thermoking evolution apu keeps blowing the 7.5amp clutch fuse and the code it shows on my computer when i hook it up to the USB on the circuit board is "Code 10, high pressure discharge".

It's not a shutdown code, it's a "Check" code.
Unit does not shutdown, it keeps running but the compressor stops working as the clutch is not engaged anymore once the fuse blows.

The thing is, when I put in another new 7.5amp fuse, it works again, runs for a few minutes, clutch engages as well. And after a few minutes, it blows the fuse again.

I read a few threads on here suggesting to hookup a manifold and monitor the pressures, high side and low side.
Here, ambient temperature is about 96 degrees and very humid.
My low side read between 15 to 20; it stabilized around 18
My high side read about 195.
It ran for a few minutes like this and blew the fuse.

To me the numbers look low pressure readings, it needs more freon.
Also since the fuse blew when pressure wasn't even high, my conclusion is the HPCO switch is bad.
I have not checked the switch itself for continuity.

I also suspected a short somewhere but wouldn't that blow a fuse right away? why would it work for sometime?

But what do you guys think?

 

Yes, it's possible the belt is loose or clutch may be slipping. When clutch engaged, it squealed a good amount before it quieted down. But the belt doesn't feel loose to the touch or twist test. It has pretty good resistance when turning it 90 degrees.
Also, do you expect this to blow a fuse? or the fuse may be unrelated to this and is caused by something else? The only code i got on my computer is "Code 10, high pressure discharge".

 

Okay, definitely will tighten the belt and wash the condenser and see what happens. Also will check resistance on clutch. Will report back for others to use this thread as learning opportunity.

 

Well I was pumped up today to open up the APU and do a lot of work. First was to tighten the belt.
So I removed the bottom cover and discovered this: the three rubber knobs thingys on the face of the clutch plate came off and were sitting in the pan. The plate itself is now loose and wiggling all over the place.
The APU wasn't used today. I run it last night to test it, when it sort of functioned for a few minutes before it blew a fuse. Those knobs were in place at the time. They came off on their own today, as truck was being driven around, I guess.
This clutch/compressor is definitely shot to hell. I have a compressor ready to be swapped in. Will do that during the weekend.

 

Okay the problem turned out to be the compressor/clutch. I replaced the Compressor and ofcourse the dryer and now no more blown fuse and works normal. Belt was good as well, so I didn't have to change.
I guess the blown fuse can be explained with something inside the clutch shorting, given how bad the clutch was and the front plate was wiggling all over the place. But I can't explain the "High pressure discharge" check code, without having any higher than normal pressure anywhere. Oh well