19) Solenoid valve : Regulate the refrigerant flow by refrigerant on/off in cycle which refrigerant flows according
as the valve operates through a coil unit being powered on. Mainly it is used when reversing the 4 way
valve of a cooling/heating model or constructing each unit cycle of multi model.
20) Check valve : Prevent refrigerant from reverse flow in refrigerating cycle. It is installed in a place where it is
necessary to prevent the reverse flow of refrigerant in a copper pipe. It has a mechanical structure and
attached to the opposite of a heating capillary to expand the heating/cooling model by two speeds, and is
constructed so as to flow through capillary in heating and through the check valve in cooling only.
TCL Air Conditioner Service Manual
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