Function general SiE39-404
74 Function
1. Function general
1.1 Symbol
Symbol Electric symbol Description or function
20S1 Y1R Four way valve (Energize during heating)
DSH – Discharge pie superheat
DSHi – Discharge pie superheat of inverter compressor
DSHs – Discharge pie superheat of standard compressor
EV – Opening of electronic expansion valve
EV1 Y1E Electronic expansion valve for main heat exchanger
EV2 Y2E Electronic expansion valve for sub-coolig heat exchanger
HTDi –
Value of INV compressor discharge pie temperature (R31T) compensated with
outdoor air temperature
HTDs –
Value of STD compressor discharge pie temperature (R32T, R33T) compensated with
outdoor air temperature
Pc S1NPH Value detected by high pressure sensor
Pe S1NPL Value detected by low pressure sensor
SH – Evaporator outlet superheat
SHS – Target evaporator outlet superheat
SVG Y3S Solenoid valve for discharging gas from receiver
SVO Y2S Solenoid valve for oil equalizing
SVP Y1S Solenoid valve for hot gas bypass
SVSL Y4S Solenoid valve for non-operating unit liquid pipe closing
Tb R4T Heat exchanger outlet temperature at cooling
Tc – High pressure equivalent saturation temperature
TcS – Target temperature of Tc
Te – Low pressure equivalent saturation temperature
TeS – Target temperature of Te
Tfin R1T Inverter fin temperature
Ts R2T Suction pie temperature detected by R2T
Tsh R5T Temperature detected by R5T
Tp – Calculated value of compressor port temperature
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