Control for 6/8 HP Outdoor Unit SiAF332111E
74 Part 4 Functions and Control
2.5.5 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.
2.5.6 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
Step No.
Fan revolutions (rpm)
RXMQ6AR RXMQ8AR
00 0
1 200 440
2 250 440
3 300 440
4 360 440
5 420 480
6 490 550
7Y 560 650
7X 630 830
8 700 960*
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