Samsung AM080FX A Series Service Manual page 306

Piping Diagram
7-3 Functions (cont.)
7-3-2 Control (cont.)
7-3-2-1 Actuator (cont.)
Solenoid Valve – Main EEV
▪ Purpose
In main cooling mode, enable the Main EEV to control the amount of refrigerant flowing in the cooling indoor units.
▪ Concept
- In main cooling mode, the valve is closed to prevent refrigerant from flowing using Check Valve – EEV Bypass and enable
the Main EEV to control the amount of refrigerant flowing into the cooling indoor units.
- If the valve is opened, most refrigerant is bypassed via the valve which flows into the cooling indoor units. As a result, there is insuf-
ficient refrigerant in active indoor units that are under heating mode.
- HR Only
▪ Control specifications in detail
In main cooling mode, the valve is Off (closed).
Solenoid Valve – Main Cooling
▪ Purpose
In main cooling mode, enable operation of heating indoor units.
▪ Concept
- In main cooling mode, the valve is opened to send the high pressure to heating indoor units and enable heating.
- HR Only
▪ Control specifications in detail
In main cooling mode, the valve is On (opened)
Samsung Electronics 325