Function General; Symbol - Daikin VRV II RXYQ8MY1K Service Manual

Function General

1. Function General

1.1

Symbol

Symbol

Electric symbol
20S1 Y1R
DSH –
DSHi –
DSHs –
EV –
EV1 Y1E
EV2 Y2E
HTDi –
HTDs –
Pc S1NPH
Pe S1NPL
SH –
SHS –
SVG Y2S
SVP Y1S
SVSL Y3S
Ta R1T (A1P)
Tb R4T
Ts R2T
Tsh R5T
Tc –
TcS –
Te –
TeS –
Tfin R1T
Tl R6T
Tp –
52
Four way valve (Energize during heating)
Discharge pipe superheated degree
Discharge pipe superheat of inverter compressor
Discharge pipe superheat of standard compressor
Opening of electronic expansion valve
Electronic expansion valve for main heat exchanger
Electronic expansion valve for sub-coolig heat exchanger
Value of INV compressor discharge pipe temperature (R31T) compensated with
outdoor air temperature
Value of STD compressor discharge pipe temperature (R32T) compensated with
outdoor air temperature
Value detected by high pressure sensor
Value detected by low pressure sensor
Evaporator outlet superheat
Target evaporator outlet superheat
Solenoid valve for discharging gas from receiver
Solenoid valve for hot gas bypass
Solenoid valve for non-operating unit liquid pipe closing
Outdoor air temperature
Heat exchanger outlet temperature at cooling
Suction pipe temperature detected with the suction pipe thermistor (R2T)
Temperature detected with the subcool heat exchanger outlet thermistor (R5T)
High pressure equivalent saturation temperature
Target temperature of Tc
Low pressure equivalent saturation temperature
Target temperature of Te
Inverter fin temperature
Liquid pipe temperature detected with the receiver outlet liquid pipe thermistor (R6T)
Calculated value of compressor port temperature
Description or function
Si39-502A
Function