romac
22-08-2007, 05:23 AM
Hi everyone.
My friend has a home with only 2 years old 3-4 tons split unit Carrier Puron with 410A in it. It's completely new including ducts and so on......
He didn't use the AC unit very much since he lives somewhere else and comes once a while to check for bugs. He maybe run the unit about 5-10 times.
About 3 weeks ago it was still running fine till 2 weeks ago he couldn't cool the home more than 84F.
Warranty for the unit was only 1 year.
I am licensed but it's a first time I am facing R410A.
I am aware of some issues about this refrigerant but still need some advice. I don't have pressure gouges for this system yet but I went to do first check up. Both fans are spinning fine. When the unit starts the low side pipe on the condensing unit gets coldish but after short time it's about 90F. I forgot thermometer so I am just guessing but have to go there anyway soon. Hi side tubing at the unit is roughly about 105-110F. I done bubble leak tests at all connections and sniff test as well with no results. When I was removing high side shrader valve plastic cap, little pressure escaped. I put it back and after while I removed it again with same little pressure escape. I bubbled it but no leak visible. The only thing I can think of is that the plastic cap reaches when seated at the valve stem and slightly pushes the valve stem but inside the plastic cap is in the center at the end small dip so it shouldn't be touching especially when there is also the oring so I am having little mystery with this. Compressor's rated max amps are 18.6amps and I am reading 14.5amps at work. Air filter is still new and never had a chance to get dirty. Ceiling registers are pretty high so I have to get long ladder to reach it but what I was able to reach in a hallway it was about 70-75F. I am going to check tomorrow at the attic for blockage at the evaporator. All ducts are round and not collapsed but something is really wrong with this virgin infant.
Thanks.
My friend has a home with only 2 years old 3-4 tons split unit Carrier Puron with 410A in it. It's completely new including ducts and so on......
He didn't use the AC unit very much since he lives somewhere else and comes once a while to check for bugs. He maybe run the unit about 5-10 times.
About 3 weeks ago it was still running fine till 2 weeks ago he couldn't cool the home more than 84F.
Warranty for the unit was only 1 year.
I am licensed but it's a first time I am facing R410A.
I am aware of some issues about this refrigerant but still need some advice. I don't have pressure gouges for this system yet but I went to do first check up. Both fans are spinning fine. When the unit starts the low side pipe on the condensing unit gets coldish but after short time it's about 90F. I forgot thermometer so I am just guessing but have to go there anyway soon. Hi side tubing at the unit is roughly about 105-110F. I done bubble leak tests at all connections and sniff test as well with no results. When I was removing high side shrader valve plastic cap, little pressure escaped. I put it back and after while I removed it again with same little pressure escape. I bubbled it but no leak visible. The only thing I can think of is that the plastic cap reaches when seated at the valve stem and slightly pushes the valve stem but inside the plastic cap is in the center at the end small dip so it shouldn't be touching especially when there is also the oring so I am having little mystery with this. Compressor's rated max amps are 18.6amps and I am reading 14.5amps at work. Air filter is still new and never had a chance to get dirty. Ceiling registers are pretty high so I have to get long ladder to reach it but what I was able to reach in a hallway it was about 70-75F. I am going to check tomorrow at the attic for blockage at the evaporator. All ducts are round and not collapsed but something is really wrong with this virgin infant.
Thanks.