Daikin RXYQ96PYDN, Руководство по обслуживанию

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SiUS34-801A_b Basic Control
VRVIII R-410A Heat Pump 60Hz 47
6.3 Electronic Expansion Valve PI Control
Main electronic expansion valve EVM control
When the outdoor unit heat exchanging is performed via the evaporator (20SA is set to ON), this
function is used to exert PI control on the electronic expansion valve (Y1E or Y3E) so that the
evaporator outlet superheated degree (SH) will become constant.
Subcooling electronic expansion valve EVT control
In order to make the maximum use of the subcool heat exchanger, this function is used to exert PI
control on the electronic expansion valve (Y2E, Y3E) so that the evaporator-side gas pipe
superheated degree (SH) will become constant.
Refrigerant charge electronic expansion valve EVJ control
While in automatic refrigerant charge mode, this function is used to exert PI control on the opening
degree of the electronic expansion valve (Y2E) in response to outdoor temperature and close the
valve after the completion of refrigerant charge.
For normal operation, fully open this electronic expansion valve.
6.4 Step Control of Outdoor Unit Fans
Used to control the revolutions of outdoor unit fans in the steps listed in table below, according to condition changes.
* Figures listed above are all those controlled while in standard mode, which vary when the system is set to high static
pressure or capacity precedence mode.
SH = Tg - Te SH : Evaporator outlet superheated degree (°F)
Tg : Suction pipe temperature (°F) detected by
the heat exchanger gas pipe thermistor R2T.
Te : Low pressure equivalent saturated
temperature (°F)
SH = Tsh - Te SH: Evaporator outlet superheated degree (°F)
Tsh:Suction pipe temperature (°F) detected by
the subcool heat exchanger outlet thermistor
R5T
Te: Low pressure equivalent saturated
temperature (°F)
STEP No.
Fan revolutions (rpm)
RXYQ72P RXYQ96P RXYQ120P RXYQ144PTJU
0 0 0 0 0
1 350 350 350 285/255
2 370 370 370 360/315
3 400 400 400 395/365
4 450 450 450 480/440
5 560 560 560 560/530
6 680 680 680 760/730
7 710 710 710 960/930
8 750 750 775 1155/1125
9 821 821 870 1200/1170
Fan1/Fan2