compressor issue when charging

[stemps22]

so i am a certified tech and was working on a 10-15 year old payne unit suction pressure was 40 so i added r-22. 8 oz. vapor. unit taking refrigeranty at a very slow rate so i added 8 more oz. in a liquid 4 at a time slowly. this got the suction pressure to about 75 and all of a sudden compressor makes intermittent wierd sounds sending the pressure up and down between 75 and 120. then compressor just stopped working. disconnected power and am hoping i just flooded it and in the morning it will be fine. what do you think???

[monkeyspanners]

Did it go "ngung ngung ngung PATCHEWWW"? and then repeat a few times before it died?

And then go "HMMMMMM click"?

[chrisevansac]

if its recip comp may be the one way valve letting liquid back through

[dakotakid]

Did it go "ngung ngung ngung PATCHEWWW"? and then repeat a few times before it died?

And then go "HMMMMMM click"?

Thats good diagnosic info there LOL

My coworker always tries to imitate sounds-usually he ends up getting mad at us when we make him repeat it about 4 or 5 times.

[dandyme]

Did it go "ngung ngung ngung PATCHEWWW"? and then repeat a few times before it died?

And then go "HMMMMMM click"?

just thought it beared repeating

[Chris_Worthington]

Did it go "ngung ngung ngung PATCHEWWW"? and then repeat a few times before it died?

And then go "HMMMMMM click"?

Bahahahahaha

[Chris_Worthington]

Did it go "ngung ngung ngung PATCHEWWW"? and then repeat a few times before it died?

And then go "HMMMMMM click"?

And why are you not a Pro here???

[coolinman]

Did you ever check the HIGH side pressure while it was running. There may have been a restriction or a TXV power assembly loosing charge and you were overcharging it causing the head to climb.

[Chris_Worthington]

Just remember the DIY thingy here guys

[stemps22]

as far as sound effects go you nailed it. good description... i take it you may have heard that sound in your day. any idea what that is/ how to avoid repeating? forgot to mention that i went back today and compressor workede and system ran fine.

[tech93]

as far as sound effects go you nailed it. good description... i take it you may have heard that sound in your day. any idea what that is/ how to avoid repeating? forgot to mention that i went back today and compressor workede and system ran fine.

Let professional charge units. liquid slugging is the term.

[stemps22]

yeah man i am a pro with more learning to go. (2 years schooling and a little less than a year field experience) thanks for the term information, however i'm curious to know what actually happened. i work for a small company and would like more feedback than the one other tech had to offer thanks

[jpsmith1cm]

yeah man i am a pro with more learning to go. (2 years schooling and a little less than a year field experience) thanks for the term information, however i'm curious to know what actually happened. i work for a small company and would like more feedback than the one other tech had to offer thanks

When you were in school, they taught you about pressure temperature relationship and some measurements that are taken by using BOTH a pressure AND a temperature.

Go ahead and start using those readings.

As to what actually happened, you probably over-charged it.

Hermetic reciprocating compressors are refrigerant cooled, so a little liquid isn't likely to hurt a healthy compressor.

[stemps22]

When you were in school, they taught you about pressure temperature relationship and some measurements that are taken by using BOTH a pressure AND a temperature.

Go ahead and start using those readings.

As to what actually happened, you probably over-charged it.

Hermetic reciprocating compressors are refrigerant cooled, so a little liquid isn't likely to hurt a healthy compressor.

great advice and thank you

[stonewallred]

And why are you not a Pro here???

Not to be contentious, but some folks, myself included, never saw the need to become "pro".
I joined in 2005 and applied for pro status in 2011.
My status as a pro or as not a pro, never impacted my ability to provide for me and mine, nor did it sell or lose any jobs.
In fact, a couple of the pro members here, unbeknown to me, were the local gurus I consulted when having a problem.

[newoldtech]

Not to be contentious, but some folks, myself included, never saw the need to become "pro".
I joined in 2005 and applied for pro status in 2011.
My status as a pro or as not a pro, never impacted my ability to provide for me and mine, nor did it sell or lose any jobs.
In fact, a couple of the pro members here, unbeknown to me, were the local gurus I consulted when having a problem.

The point is this site is not supposed to be about giving DIY advice to people who may not be in the trade.

[knowledge]

Hermetic reciprocating compressors are refrigerant cooled, so a little liquid isn't likely to hurt a healthy compressor.

Is this true for Scrolls too?

[jpsmith1cm]

Is this true for Scrolls too?

Scrolls are quite tolerant of liquid as well.

[beshvac]

Are you in Richmond, VA?

I took 11 lbs 5 ozs out of an AC this morning that only holds 9lbs to get the superheat right....

[stemps22]

haha nah man nc, i put 16 ounces total and it was then charged properly. thats pretty sad tho 11 pounds over charged. i have more to learn but i believe i'm well past doing anything like that