No cooling; 2.5 Ton Rheem R22 AC system (Piston) Found clipped 24V wire at outdoor equipment. Checked capacitor, checked compressor amps. Replaced 16x24x1 Filter. Spliced wire. Tested system operation. 17.5 degree temperature split. High subcooling and low superheat indicate a restricted metering device. System is operating but not at desirable efficiency. Recommend replacing system.