Arrived at location on 1/31/22 - Found bad contactor for circuit E. Pumped unit down and checked operation of pressure control and it is cycling off at 5 psi with a 15 psi differential. Checked operation of both units and fans are running and unit is dropping in temp properly. Checked receiver level and it is about 25%,called Jeremy Fry and spoke with him and he would like us to hold off on topping unit off with 448 a refrigerant. The circuit F is also low on charge and will need topped off. Customer supplied the contactor.