Question about Heating & Cooling
My Lennox HS22 series split system scroll compressor gets loud and goes off on internal overload.The condenser fan stays running and seems to be turning at the correct speed.My coil is clean and my filters are new.It will run fine for a while but then overheat. the unit is 19 years old.it is a scroll compressor.
There couild be a small blockage in the refrigerant piping. This obstruction could be cyling through the system and causing the pressures to increase and decrease which is overheating the compressor. Normally when the compressor is overheating there is not enough refrigerant getting returned to the compressore to keep it cool while running. When it shuts down the the refrigerant equalizes which can return the blockage back to the coil or just simply dislodge it frome where it is hung up. When the compressor returns to its running temp, it turns back on and can cycle that blockage through the refrigerant piping which sometimes it may go thru and sometimes gets hung up and clog the system again. I would have a certified technician come over and hook their manifold to the system which can easily tell them if there is a blockage or he can trace the problem. Do you know what type of metering device is in the coil inside?
Posted on Jun 06, 2010
Testimonial: "Thanks Terry I did refrigeration for over ten years but got out of it 15 years ago...It took a while for my brain cells to click.I didn't think about the blockage which still may be a possibility. My pressures were a little low for my ambient temp so I added some freon now I have a good sweat back to the compressor and it has been working good for the last 3 hrs...the temps outside are supposed to hit the hi 90's and I will keep an eye on my head pressure.it is a split system and I'm getting some sweating at my txv..that is were the restriction usually happens.I used to get a lot of cap tube restrictions in small systems.thanks for the help."
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Posted on Jan 02, 2017
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