Daikin VRV RXYMQ-A Series, Руководство по обслуживанию

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Normal Control SiME332106E
58 Part 4 Functions and Control
Note(s)
5.5 Electronic Expansion Valve Control
Electronic expansion valve Y1E
 Cooling: electronic expansion valve is used only at fully closed or fully open condition:
 Compressor(s) OFF: fully closed (0 pulse).
 Compressor ON:
 Fully open (480 pulses)
 Normally, the control is used to reduce the PCB temperature.
 Heating: electronic expansion valve is used in PID control suction superheat:
 Compressor(s) OFF: fully closed (0 pulse).
 Compressor ON:

At startup: closed (check suction pressure drops)
 Modulated opening by:
- Suction superheat = accumulator inlet °C – evaporating temperature.
- Discharge superheat = discharge compressor °C – condensing temperature.
- Preventive change when compressor capacity step changes.
- Limited opening when condensing temperate exceeds target condensing.
5.6 Step Control of Outdoor Fans
Used to control the revolutions of outdoor fans in the steps listed in table below, according to
condition changes.
* When the system detects that outdoor air temperature (Ta) reaches 41°C or more, the control
of fan revolutions will be changed to 1,060 rpm automatically.
 Table shown above is for external static pressure level 0. In case of high external static
pressure, the unit will re-adjust fan revolutions automatically and values may differ.
 When capacity priority mode is set, values may differ.
Compressor
Main
Y1E
0 Hz
0
480
pulses
Compressor
Main
Y1E
0 Hz
0
480
pulses
Step No.
Fan revolutions (rpm)
RXYMQ4AVMK RXYMQ4-6AYFK
Cooling Heating Cooling Heating
0 0 0 0 0
1 200 200 440 440
2 250 250 440 440
3 300 300 440 440
4 360 370 440 440
5 420 440 480 550
6 490 515 550 660
7Y 560 590 650 780
7X 630 670 830 940
8 700 750 960* 1,060