Function General; Symbol - Daikin VRV III REYQ8PY1 Service Manual

Function General

1. Function General

1.1

Symbol

Electric symbol

Symbol

REYQ8~16P REMQ8~16P
Y2S
(Heat
exchanger1)
20SA
Y9S
(Heat
exchanger2)
20SB Y8S
DSH –
DSHi –
DSHs –
EV –
Y1E (Main1)
EVM
Y3E (Main2)
Y2E
(Subcooling1)
EVT
Y5E
(Subcooling2)
EVJ Y4E
HTDi –
HTDs –
Pc S1NPH
Pe S2NPL
SH –
SHS –
Y5S
(Bypass1)
SVE
Y10S
(Bypass2)
SVP Y4S
SVL Y3S
SVG Y1S
SVO Y7S
SVT Y6S
96
Y3S Four way valve (Heat exchanger switch)
Y2S Four way valve (High/low pressure gas pipe switch)
– Discharge pipe superheated degree
– Discharge pipe superheat of inverter compressor
– Discharge pipe superheat of standard compressor
– Opening of electronic expansion valve
Y1E Electronic expansion valve for main heat exchanger
Y3E Electronic expansion valve for subcooling heat exchanger
Y2E Electronic expansion valve at the refrigerant charge port
Value of INV compressor discharge pipe temperature compensated with outdoor
–
air temperature
Value of STD compressor discharge pipe temperature compensated with outdoor
–
air temperature
S1NPH Value detected by high pressure sensor
S2NPL Value detected by low pressure sensor
– Evaporator outlet superheat
– Target evaporator outlet superheat
Y6S Main bypass solenoid valve
Y5S Solenoid valve for hot gas
Y4S Refrigerant regulator liquid pipe solenoid valve
Y1S Refrigerant regulator gas pipe solenoid valve
Y7S Refrigerant regulator exhaust pipe solenoid valve
Y8S Refrigerant regulator discharge pipe solenoid valve
Description or function
Si37-701
Function