chart interpretation

[TB]

I got a:

EAV-0200-TAC-800 Copland semi-herm
R-502
110* condensing temp
-20* evap temp
-5* box (walk in)
TXV (no epr's or anything)
3-phase, 208v.
FLA 6.6 A

The noise caught my attention as I was looking at the cooler. It is rattling now, slightly more than I remember. The unit was drawing 4.5 A., 4.5 A., 4.6A, and that is not even on the chart. The chart stops at 5 A.

How should I interpret this? I am not allowed to open up the head and look at it right now.

[icemeister]

According to Copeland's Compressor Calculator that compressor should be drawing 6.5 amps at -20ºF SST/110ºF SDT on R502. You probably have a broken valve or connecting rod. Pull the head and check it out.

[basser]

TB, again icemeister is right on course. When you see low amps like this think of something broken or worn. Check for a broken rod or broken reeds.

Also look closely at the piston height. Bring each piston to the top of the cylinder. What I suspect is you may have wear in the wrist pin area. This will emit a tapping or knocking noise depending on the amount of wear. Look closely at each cylinder. If wear is found here that's bad news your looking at a compressor replacement, probably sooner then later.

[270wsm]

where can I get a copeland calculator?

[rocket]

go to
http://www.copeland-corp.com/

note are for user name, just below it askd "why sign up" click this

after you are signed up, you can search for and
download "CpCalc"

for Carlye's version, go to http://www.carlylecompressor.com

[270wsm]

i downloaded it but it wont install. SAys There is a
"Corrupt installation file" what now?

[rocket]

believe what it says and download again

[TB]

Originally posted by basser
TB, again icemeister is right on course. When you see low amps like this think of something broken or worn. Check for a broken rod or broken reeds.

Also look closely at the piston height. Bring each piston to the top of the cylinder. What I suspect is you may have wear in the wrist pin area. This will emit a tapping or knocking noise depending on the amount of wear. Look closely at each cylinder. If wear is found here that's bad news your looking at a compressor replacement, probably sooner then later. Thanks guys. I was thinking along these lines too, thought I'ld ask, though, since I'm new to chart reading.