Many info around button, control, remote controller, controller, temperature, and discharge pipe are explained in the service repair manual. In the service repair manual we can find description around led outdoor unit, fan, thermistor resistance, thermistor, setting, and switch.
This service repair manual gives you things about unit control pcb, remote, exchanger, compressor, unit control, and outdoor unit control. Below are grabbed from the service repair manual:
Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called ice clogging. Evacuation procedure Make sure that the both service valves of gas and liquid line are fully opened. (a) Indoor unit Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it should be relived through the service port. (b) Gus line Outdoor unit Connect the charging hose of the gauge mani- Liquid line fold to the service port of the gas piping. Charge port Close high pressure valve 2 of gange manifold. Gauge manifold (for R410A only) Connect the charging hose A to a vacuum pump. 1 2 No increase in the reading of the vacuum gauge’s needle pointer.
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