Heating Maintenance on x4 Mitsubishi Ductless Systems Heat Pump. Perform a tune-up and cleaning to help ensure reliable and safe operation on x4 indoor heads x2 outdoor condenser unit. Blower Motor – measure amperage and voltage for proper operation Thermostat – test for proper operation, calibrate and level-ok Clean existing air filters-cleaned and washed. Check and clean fan blower wheel-ok Clean indoor coil-cleaned and washed Clean Condenser Coil-cleaned and washed Flushed out drain line-ok Monitor refrigerant operating pressures-ok suction line:125psi Refrigerant type: 410A Electrical Disconnect Box – inspect for safe installation Electrical Wiring – inspect and tighten connections-ok Test/inspect contactors for burned, pitted contacts-good Inspect electrical for exposed wiring-good Inspect and test capacitors-good Inspect fan blade-ok Clean condenser coil and remove debris-ok Inspect service valves for proper operation-good Compressor – monitor and wiring connections-good Systems