dx alp 100 mc quay

[joaquim pereira]

hi
i am having a problem with this dx system which is having a flood back ,after changing the EXV still the problem is same ,the AHU cap 37000 btu.even thou the ahu is running u can still open the motor panel door without any force,is the AHU under cap or their any other problem beside this

[Brian_UK]

Are there any duct dampers that have been closed ?

Fire dampers ?

If no suction pressure on fan then the discharge is blocked somewhere.

Resolve airflow problem before touching the refrigeration side.