Daikin VRV III REYQ8PY1, Service Manual

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