AAON suction pressure

[bwd111]

Scroll on the aaon is going into a vacuum! I changed out the txv and filter drier and still seem to have restriction. Runs for 15 sec the cycles off. High side 185 . Might have ruined the the power head when brazing but wrappped it pretty well. What elese could it be?

[hands]

What kind of refrigerant, R-22 or R-410a. Did you weigh in the rated charge? Could be a restricted evap coil if the TXV is okay. Is the TXV frosting up or can you feel a temp drop anywhere on the liquid line. If it is going off in 15 sec, you can hold in the contactor for a short time to look for frost.

[Texas-Tech]

Might have ruined the the power head when brazing but wrappped it pretty well. What elese could it be?

Your probably ok, have never had a problem with overheating the valve even though sometimes I was a little worried.

How old is the unit? It's pretty hard to get a restriction in a 3/8 or larger size pipe. Does the compressor sound normal?