Scroll Compressor draws about 10 amps more than it should

[Sicofthis]

So you never really did 1)

Yeah, this made me wonder DIY.

[barbar]

Did you check voltage when it is running? If not, well????

But I will take a guess, on copeland scrolls, discharge pressure is the biggest single factor on power draw (presume voltage is good), because you have fit more than one, then i will say that you pressure port is being influenced by flow, like a venturi.

New pressure tapping required.

[Butch1234]

Edit: Removed my reply becoming too DIY. Apply for a pro account.

not sure what that means....we did some more checking last night...the CPR valve may be an issue but too soon to say....also we probably do have too much R22 in the system and we are removing some...this may be part of the problem...more later...we need to check a few more things...thanks for all the suggestions so far nothing definite

[Saturatedpsi]

Did you check voltage when it is running? If not, well????

And measuring at the disconnect doesn't eliminate a voltage problem.

[Butch1234]

And measuring at the disconnect doesn't eliminate a voltage problem.

technically you are correct, however, the voltage at the disconnect is effectively the voltage at the motor in this case ,..there is 3 ft of copper wire from the disconnect to the starter, 2 feet from the starter to the motor and all wires are good....if we had a bad wire it would have shown up...in this case we do not have a voltage problem..thanks for your input

[Butch1234]

we can actually measure the discharge pressure in several places in the piping...the discharge pressure is a good reading....but you do have a good point...I have seen this problem before but more like a pitot tube...

we checked some more last night and are wondering if the CPR valve may not be working properly...a simple regulator but perhaps it is stuck.. will check some more thanks

[Butch1234]

the more we look at it it appears the CPR valve is the problem see this link

http://www.real-world-refrigeration....-valves-3.html

will let everyone know if this is the problme..thanks

[timebuilder]

First of all, you need to measure voltage at the terminals, because you can't assume you don't have a bad wire, a bad crimp or a bad connection at the compressor itself. Second are you a homeowner or a technician?

[Saturatedpsi]

Got my doubts, based on the reported suction pressures, but I'm not there so...

[Butch1234]

I am a licensed professional electrical and nuclear engineer with extensive expereince.

[timebuilder]

In that case this thread belongs in the AOP section.

I am the son of an engineer and I have really extensive experience and I can tell you that there is a broad difference between being an engineer and being the guy who fixes things. This is mainly manifested in the difference between the world of theory and the world of reality.

Btw, Butch was my name my parents called me until I went to private school!

[Saturatedpsi]

I am a licensed professional electrical and nuclear engineer with extensive expereince.

You're over-qualified for heat pump diagnostics...

[Saturatedpsi]

In that case this thread belongs in the AOP section.

Please make an exception in this case...I'd really like to see the final analysis/diagnosis.