COOLING SEASON SERVICE • Perform static air pressure check on equipment • Check condensate drain pan, clean if necessary • Check condensate trap and prime and clear out lines, 4 times a year • Visually check for refrigerant leaks • Check disconnects and fuses • Check electrical wiring • Check and tighten electrical connections • Inspect contactors for pitting • Check and test system safeties • Verify that the expansion valve bulb is in the proper location • Lubricate motors if applicable • Check voltage and amperage on compressor and all other motors • Check the temperature differential • (Delta T) across evaporator coil • Look at the difference between the return and supply air. If it's abnormal, attach gauges, check suction and head pressures, and obtain refrigerant pressures. • Check superheat and subcooling • Check and clean condenser coils, straighten if necessary • Check blower, clean if necessary • Check belt, replace if necessary • Check economizer for proper operation • Replace filters • Properly secure unit panels • Check thermostat operation
