Daikin RXYQ96PYDN, Руководство по обслуживанию

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Refrigerant Circuit SiUS34-801A_b
132 VRVIII R-410A Heat Recovery 60Hz
2.3 REMQ72PYDN, PTJU (Multi 6ton)
No. in
refrigerant
system
diagram
Symbol Name Major Function
1 M1C Inverter compressor (INV)
Inverter compressor is operated on frequencies between 52Hz and 210Hz by using the
inverter.
Compressor operation steps : Refer to page 190.
4 M1F Inverter fan
Since the system is of the outdoor unit heat exchanging type, the fan is operated at 9-step
rotation speed by using the inverter.
6 Y1E
Electronic expansion valve
(Main: EVM) While in heating operation, PI control is applied to keep the outlet superheated degree of
the outdoor unit heat exchanger constant.
7 Y3E
Electronic expansion valve
(Subcool: EVT) PI control is applied to keep the outlet superheated degree of subcooling heat exchanger
constant.
8 Y2E
Electronic expansion valve
(Refrigerant charge EVJ)
Used to open/close refrigerant charge port.
9 Y6S
Solenoid valve (Main bypass
SVE)
Opens in cooling operation.
10 Y5S Solenoid valve (Hot gas: SVP) Used to prevent the low pressure from reducing.
11 Y4S
Solenoid valve (Refrigerant
regulator liquid pipe SVL)
Used to collect refrigerant to the refrigerant regulator.
12 Y1S
Solenoid valve (Refrigerant
regulator gas purging pipe
SVG)
Used to collect refrigerant to the refrigerant regulator.
13 Y7S
Solenoid valve (Refrigerant
regulator discharge pipe SVO)
Used to discharge refrigerant from the refrigerant regulator.
14 Y8S
Solenoid valve (Discharge
pipe of refrigerant regulator)
Bypasses the high pressure gas to the refrigerant regulator.
15 Y3S
4-way valve (Heat exchanger
switch 20SA)
Used to switch outdoor heat exchanger to evaporator or condenser.
16 Y2S
4-way valve (Dual pressure
gas pipe switch 20SB)
Used to switch dual pressure gas pipe to high pressure or low pressure.
17 S1NPH High pressure sensor Detects high pressure.
18 S2NPL Low pressure sensor Detects low pressure.
19 S1PH
HP pressure switch (For INV
compressor) Functions when pressure increases to stop operation and avoid high pressure increase in
the event of a fault.
22 —
Pressure regulating valve
(Liquid pipe) Used when pressure increases, to prevent any damage on components caused by
pressure increase in transport or storage.
23 —
Pressure regulating valve
(Refrigerant regulator) Used when pressure increases, to prevent any damage on components caused by
pressure increase in transport or storage.
24 — Subcooling heat exchanger Applies subcooling to liquid refrigerant.
25 — Refrigerant regulator Surplus refrigerant is held according to the operation conditions.
26 — Capillary tube Returns the refrigerating oil separated through the oil separator to the INV compressor.
29 — Capillary tube Used to discharge refrigerant from the refrigerant regulator.
30 R1T Thermistor (Outdoor air: Ta) Detects outdoor temperature.
31 R8T Thermistor (Suction pipe: TsA) Detects suction pipe temperature.
32 R31T
Thermistor (INV discharge
pipe: Tdi) Detects detect discharge pipe temperature. Used for compressor temperature protection
control.
35 R4T
Thermistor (Heat exchanger
deicer Tb) Detects temperature of some of the liquid pipes for the outdoor unit heat exchanger. Used to
make judgments on defrosting operation.
36 R2T
Thermistor (Heat exchanger
gas pipe Tg)
Detects temperature of gas pipe for the outdoor unit heat exchanger. Used to exercise the
constant control of superheated degree when an evaporator is used for outdoor unit heat
exchanging.
37 R7T
Thermistor (Heat exchanger
liquid pipe Tf)
Detects temperature of liquid pipe between the the outdoor unit heat exchanger and main
electronic expansion valve. Used to make judgments on the recover or discharge
refrigerants to the refrigerant regulator.
38 R5T
Thermistor (Subcooling heat
exchanger gas pipe Tsh)
Detects temperature of gas pipe on the evaporator side for the subcooling heat
exchanger. Used to exercise the constant control of superheated degree at the outlet of
subcooled
heat exchanger.
39 R6T
Thermistor (Subcooling heat
exchanger liquid pipe Tl) Detects temperature of liquid pipe between the main expansion valve and subcooling heat
exchanger.
40 R9T Thermistor (Liquid pipe Tsc)
Detects temperature of liquid pipe between the liquid stop valve and subcooling heat
exchanger.