Piping Diagram
Samsung Electronics 203
No Part Name Abbreviation Symbol Function
19
MainCooling Valve
(Solenoid valve-Main Cooling)
V_MC
Opening the valve during cooling operation and sends
a high-pressure gas into the indoor unit for the heating
operation. (HR Only)
20
Accumulator Oil Return Valve
(Solenoid valve-Accumulator Oil
Return)
V_AR
21
4Way Valve
(Solenoid valve-4Way)
V_4W
It determines the cooling / heating operation mode.
22
Discharge Temp. Sensor
(Thermistor-Discharge pipe)
T_D
Measure the temperature of the compressor discharge pipe.
It is mainly used to protect the compressor.
23
Suction Temp. Sensor
(Thermistor-Suction pipe)
T_S
Measure the temperature of the compressor suction line.
It is used to determine the suction superheat of the
compressor.
24
Cond Out Temp. Sensor
(Thermistor-Cond Out)
T_CO
Measure the liquid pipe temperature of the heat exchanger.
Used to enter in defrosting operation and escape judgment.
25
EVI In Temp. Sensor
(Thermistor-EVI In)
T_EI
Measure the temperature of the intercooler inlet pipe (EVI
EEV side). It is used to determine the superheat of the EVI
In / Out.
26
EVI Out Temp. Sensor
(Thermistor-EVI Out)
T_EO
Measure the temperature of the intercooler outlet pipe (EVI
EEV side). It is used to determine the superheat of the EVI
In / Out.
27
Liquid Tube Temp. Sensor
(Thermistor-Liquid pipe)
T_L
Measure the temperature of the outdoor liquid pipe.
It is used to determine the supercooling.
28
Comp. Top Temp. Sensor
(Thermistor-Compressor Top)
T_CT
To measure the surface temperature of the compressor Top
Cover. It is mainly used to protect the compressor.
29
Ambient Temp. Sensor
(Thermistor-Ambient)
T_A Measure the temperature of the outdoor air.
■ Cycle component Symbol and Function (cont.)
7-1 Piping Diagram (cont.)
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