Trane XR14 410A 3.0ton heatpump 2016 unit
System works on heat mode perfectly 150psi/270psi , but not in cool mode. When switching to cool mode subcooling drops to -2 and pressure drop to 55/168. If I keep adding freon system shuts off from high pressure switch. With freon levels back to normal service port above the reversing valve is reading 313psi. outside ports are 55/168ish. Also Im pretty sure last summer the 3/8 line was warm and the 3/4 return line was sweating. Now the 3/8 line sweats and the return line is room temp. If I follow the 3/8 line back inside the condenser it sweats all the up to the condenser TXV valve. This may or may not be normal. Any suggestions?
System works on heat mode perfectly 150psi/270psi , but not in cool mode. When switching to cool mode subcooling drops to -2 and pressure drop to 55/168. If I keep adding freon system shuts off from high pressure switch. With freon levels back to normal service port above the reversing valve is reading 313psi. outside ports are 55/168ish. Also Im pretty sure last summer the 3/8 line was warm and the 3/4 return line was sweating. Now the 3/8 line sweats and the return line is room temp. If I follow the 3/8 line back inside the condenser it sweats all the up to the condenser TXV valve. This may or may not be normal. Any suggestions?
source https://hvac-talk.com/vbb/showthread.php?2226094-2016-Trane-low-pressure-on-cooling-negitive-subcooling&goto=newpost
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