Your a world of encouragement brother thank you for your patience and your kind words.
Originally Posted by lynn comstock
Depends on the compressor.
Capacitor start motors are quite common in refrigeration equipment.
Most of them come with what is called a 3 in 1 start kit (aftermarket term, manufactures call them start components).
If you have condemned the compressor, why are you wondering what it is doing?
Compressor is bad or good, and a simple test will show that it is good or bad on the windings side of it.
If windings are good, then you check the valves.
I'd get someone who does reefer work for a living to give you a hand.
Offer to compensate them, and then they can give you pointers OTJ.
If the condenser was clogged and it caused even a partial restriction in the cap tube, it could cause problems when the compressor tries to start. Pull the charge and replace the cap tube/drier and weigh in the charge to be sure.
I agree that cap tube restriction is highly likely whether or not the compressor starts unloaded.
Originally Posted by CARTNEYRK68
Im not afraid to ask a stupid question, and Im sure the OP will benefit from this answer as well. But....., how does a clogged condenser cause a restriction in the cap tube? Anything to do with over-heated oil?
Originally Posted by CARTNEYRK68
Also, a question for the OP, what were your amp readings on the compressor when it tries to start?
Last edited by aintitfun; 07-08-2011 at 01:21 PM.
For the mineral oils, 300°F temperature at the discharge valve which is the hottest spot in the system caused oil decomposition. See http://lvhvac.com/cope_bulletins/RSDtechTips.pdf
Originally Posted by aintitfun
I presume that this is the same for the new oils (POE and others) for the HF refrigerants. Can anyone verify that?
most of the freezers i see are all on R404a not 134!
If the condenser was blocked adding gas won't solve anything mate.
reclaim all the gas, vac it out and start again, adding the exact amount on the data plate and put an amprobe on the compressor too.
as the motor's had time to cool down, If you're lucky it'll run
back up a few steps
i still havent seen pressures yet how can we say restricted cap tube if we dont know head pressure. also does the compressor run what are the running pressures if yes. is the compressor tripping off on high pressure.whats your pressure controls set at its really hard to give any answers i think without complete info reply with listed info
pressure control settings
ohm ratings of comprssor
metering device type
As I recall on these things, you won't find a low or a high pressure control. All they have is a thermostat. Internal overload on the compressor is about it. I agree that we still should know the high pressure though, in case the compressor is trying to start when the system has not equalized.
Originally Posted by cavalieri85
Sorry guys I've been bussy. The Compressor is not starting so I have no pressure readings for it. All it does is make a rumbling sound for a few seconds and no change in pressures.
Have you ohmed out the windings on the compressor once it is cool?
Originally Posted by sda
That will tell you if the compressor is good or not on the electrical side?
I am assuming it is a recip?
Is it rumbling then cutting off on internal or rumbling and free spinning?
We still want to see the pressure readings. Humor us. There are reasons. If there is any change at all during the rumbling let us know that as well.