Talked to customer found that unit number three is the unit not working. perform diagnostic found thermal expansion valve/TXV not metering refrigerant properly. restricted needs new thermal expansion valve/TXV for unit to operate and cool properly. Talked to previous tech found system was charged with about 2 pounds of our 410a refrigerant which indicates system has leak somewhere‘s perform leak search found evap coil leaking talked to customer do not recommend TXv due to coil having a leak recommend coil replacement.