Daikin VRV III RXYQ5-54PY1, Руководство по обслуживанию

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Si34-601A Basic Control
Function 107
2.3 Electronic Expansion Valve PI Control
Main Motorized Valve EV1 Control
Carries out the motorized valve (Y1E) PI control to maintain the evaporator outlet superheated
degree (SH) at constant during heating operation to make maximum use of the outdoor unit
heat exchanger (evaporator).
The optimum initial value of the evaporator outlet superheated degree is 5°C, but varies
depending on the discharge pipe superheated degree of inverter compressor.
Subcooling Motorized Valve EV2 Control
Makes PI control of the motorized valve (Y2E) to keep the superheated degree of the outlet gas
pipe on the evaporator side for the full use of the subcooling heat exchanger.
2.4 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 = Ts1 - Te SH : Evaporator outlet superheated degree (°C)
Ts1: Suction pipe temperature detected by
thermistor R6T (R7T) (°C)
Te : Low pressure equivalent saturation
temperature (°C)
SH = Tsh -Te SH : Outlet superheated degree of evaporator (
°
C)
Tsh : Suction pipe temperature detected with the
thermistor R5T (
°
C)
Te : Low pressure equivalent saturation
temperature (
°
C)
STEP
No.
Fan revolutions (rpm)
RXYQ5P RXYQ8P RXYQ10P
RXYQ12P
(Europe)
RXYQ12P
(except Europe)
RXYQ14P
RXYQ16P RXYQ18P
FAN1 FAN2 FAN1 FAN2 FAN1 FAN2
0 0 0 0 0 0 0 0 0 0 0
1 285 350 350 350 230 0 230 0 395 0
2 315 370 370 370 380 0 380 0 460 0
3 360 400 400 400 290 260 290 260 570 0
4 450 450 460 460 375 345 375 345 385 355
5 570 540 560 560 570 540 570 540 550 520
6 710 670 680 680 720 690 720 690 800 770
7
Cooling: 951
Heating: 941
760
Cooling: 821
Heating: 800
870 1091 1061 1091 1061 1136 1106
8
Cooling: 951
Heating: 941 Cooling: 796
Heating: 780 Cooling: 821
Heating: 800
870 1136 1106 1136 1106 1166 1136