What do you think?? TXV or Compressor??
2 ton ducted split system, 2007 builder grade apartment unit
Evap coil and TXV replaced 3ish years ago
converted 22 to 407c
Pressures after replacement documented at 90/245 superheat at compressor 8°, 11° subcool
Found compressor open on thermal, cooled down with water, ohms are good. Running pressures at 108/ 254 (pic above for temps)
ambient at condenser 101°
Ambient at Evap 79°
Evap delta 8-10°
Compressor amps 9 at 50ish % RLA
I pulled the sensing bulb and put it in ice water, pressures dropped 64/228 (pic above) superheat skyrocketed, Evap delta went to 0-2° (no cooling)
Bulb in hand floods coil, superheat goes negative and Evap delta T is 10-11°
My original diag was a bad valve cause it seems to be metering incorrectly. I’ve been challenged on that by a tech I respect, he said the valve is working and suspects a weak compressor. It’s a scroll so I’m not clear on how it could be weak. I have diagnosed weak recip compressors with pump down test. Scrolls make scary noises when pumped down so I don’t usually try. I don’t want to ask AI so I’m here and hoping for an educated answer. Stay safe out there tech bros! Thanks