Daikin RWEYQ28PY1 [80/342] Startup control

Daikin RWEYQ30PY1 [80/342] Startup control
Si30-813 Startup Control
Function 69
4. Startup Control
This startup control is used to provide the following control to reduce the compressor load
resulting from liquid return or else during compressor startup, and also determine the position of
four way valves.
4.1 Cooling Start-up Control
Both master and slave units operate same time for changing 4 way valve position
Normal
operation after completion.
Parts name Symbol
Electrical
symbol
Pressure equalization
control before start-up
Starting control
Compressor (M1C) 0 Hz
52Hz
+2 steps/20 sec.
(until Pc-Pe >0.49
MPa)
Inverter cooling fan (M1,2F) OFF
Inverter cooling fan
control
4 way valve (Main) 20S1 (Y5S) Holding OFF
4 way valve (for heat exchanger) 20S2 (Y7S) Holding OFF
Main heat exchanger electronic exp. valve EV1 (Y1E) 0 pulse 2000 pulse
Sub-cooling electronic exp. valve EV3 (Y3E) 0 pulse 0 pulse
Hot gas bypass solenoid valve SVP (Y1S) OFF ON
Water heat exch. oil return solenoid valve SVE (Y2S) OFF OFF
Receiver gas charging solenoid valve SVL (Y3S) OFF OFF
Receiver gas discharge solenoid valve SVG (Y4S) OFF OFF
Non-operation unit liquid pipe stop
solenoid valve
SVSL (Y6S) ON ON
Indoor unit fan (M1,2F) Indoor unit control Indoor unit control
Indoor unit expansion valve EV (Y1E) 0 pulse
0 pulse Initial
opening
Ending condition 1 minute Max. 5 minutes
Thermostat ON

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