Most of my work has been new construction and very little service tech
so forgive me if this is too simple. My ex-wife called me a few days
ago and said her heat pump wasn't cooling. She said someone replaced
the compressor, which made it much better, but it's still not cooling
like it should. So I thought that unless I want to give her even more
of my hard earned money, I better load up the truck and head over.
Here's what I found. It's a 3 ton 10 seer HEIL split system heat pump
with a TXV. New copeland recip compressor and new dual cap. Coils
are clean, filter is clean. I put the guages on and that's when I got
a little confused.
outside air temp - 81
inside air temp = 78
Outdoor humidity: ~70%
Suc Pressure - 64
Suc temp - 80
Liq Pressure - 200
Liq temp - 87
Condenser TD - 13
Evaporator TD - 14
My handy Trane charging chart shows it being slightly overcharged....
but shouldn't be enough to give me such a low TD across the evap.
Rather than just start fiddling with the charge I thought I might want
to actually try to figure out what's wrong with it.
The only other thing out of the ordinary is the condenser fan was
replaced with one that's 75 rpm faster. It calls for a 1075 rpm and
has a 1150. In my brief experience I believe that won't have a big