Specifications

Function General SiUS39-602
38 Function
1. Function General
1.1 Symbol
Symbol Electric symbol Name and function
20S1 (Y1R) Fore way changeover valve (Main)
20S2 (Y2R) Fore way changeover valve (Sub)
DSH (—) Discharge pipe superheated degree
DSHi (—) Discharge pipe superheated degree of inverter compressor
DSHs (—) Discharge pipe superheated degree of standard compressor
EV (Y1E,Y2E,Y3E) Opening of electronic expansion valve
EV1 (Y1E) Electronic expansion valve of main heat exchanger
EV2 (Y2E) Electronic expansion valve of sub heat exchanger
EV3 (Y3E) Electronic expansion valve of sub-cooling heat exchanger
HTDi (—)
Value of INV compressor discharge pipe temperature (R31T) compensated with
outdoor air temperature
HTDs (—)
Value of STD compressor discharge pipe temperature (R32T,R33T) compensated
with outdoor air temperature
Pc (S1NPH) Pressure value detected by high pressure sensor
Pe (S1NPL) Pressure value detected by low pressure sensor
SH (—) Evaporator outlet superheat
SHS (—) Target evaporator outlet superheat
SVC (Y7S) Solenoid valve for reducing pressure in high pressure gas pipe
SVG (Y4S) Solenoid valve for discharging receiver gas
SVL (Y3S) Solenoid valve for charging receiver gas
SVO (Y2S) Solenoid valve for Oil equalization
SVP (Y1S) Solenoid valve for hot gas
SVR (Y5S) Solenoid valve for discharge gas pipe closing
SVSL (Y6S) Solenoid valve for non-operating unit liquid pipe closing
Tb (R4T) Heat exchanger outlet (during cooling) temperature
Tc (—) High pressure equivalent saturation temperature
Tcs (—) Target Tc temperature
Te (—) Low pressure equivalent saturation temperature
TeS (—) Target Te temperature
Tfin (R1T) Inverter fin temperature
Ts (R2T) Suction pipe temperature detected by R2T
Tsh (R5T) Temperature detected by R5T
Tp (—) Calculated value of compressor port temperature