Daikin RQYQ16PY1 [46/194] Startup control

Daikin RQYQ18PY1 [46/194] Startup control
Detailed Control Functions Si341009
37 Function
2.3 Startup Control
This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the
compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.
To avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the
position of the four way valve is also determined. Start both the master and the slave units simultaneously to position
the four way valve.
(1) Startup Control in Cooling Operation
(2) Startup Control in Heating Operation
[Ending conditions]
OR
· A lapse of 130 sec.
· Tc > 48˚C
· Pe < 0.54Pa
· Pc-Pe > 0.4MPa.
Inverter compressor (INV.)
(M1C)
0 Hz
0 pls
Step 4
52 Hz
0 pls
10 sec.
Ta < 20˚C : OFF
Ta 20˚C : Step 4
+1 Step / 15 sec. (when Pc > 2.2 MPa)
-1 Step / 15 sec. (when Pc < 1.8 MPa)
+2 Step / 20 sec.
480 pls
Thermo. ON: Initial opening
Electronic expansion valve
(Y1E: Main)
Inverter fan
(M1F)
Indoor unit electronic
expansion valve
(Y1E)
Ta: Outdoor air temperature
Tc: High pressure equivalent
saturation temperature
Pc: Value detected by high
pressure sensor
Pe: Value detected by low
pressure sensor
0 Hz
ON
OFF
0 pls
Step 4
+2 Step / 20 sec.
[Ending conditions]
OR
· A lapse of 130 sec.
· Pc > 2.65MPa
· Pc-Pe > 0.4MPa.
52 Hz
124 Hz
Initial opening
Step 8
10 sec.
Inverter compressor (INV.)
(M1C)
Electronic expansion valve
(Y1E: Main)
Inverter fan
(M1F)
Four way valve
(Y3S)

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Hi, good afternoon.
1 год назад