SiBE341001
Detailed Control Functions
Function
38
2.4
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 (Outdoor unit heat exchanger = Evaporator)
(3) Startup Control in Heating Operation (Outdoor unit heat exchanger = Condenser)
[Ending conditions]
OR
· A lapse of 90 sec.
· Tc (high pressure equivalent
saturation temperature) > 48˚C
· Pc-Pe > 0.39MPa.
Inverter compressor (INV.)
(M1C)
0 Hz
0 pls
Step 4
52 Hz
0 pls
15 sec.
Ta < 20˚C : OFF
Ta
≥
20˚C : Step 4
+1 Step / 15 sec. (when Pc > 2.16 MPa)
-1 Step / 15 sec. (when Pc < 1.77 MPa)
+4
→
+7
→
+5 Step / 20 sec.
1375 pls
Thermo. ON: Initial opening
Electronic expansion valve
(Y1E: Main)
Inverter fan
(M1F)
Indoor unit electronic
expansion valve
(Y1E)
0 Hz
ON
OFF
0 pls
Step 4
+4
→
+7
→
+5 Step / 20 sec.
[Ending conditions]
OR
· A lapse of 90 sec.
· Pc-Pe > 0.39MPa.
52 Hz
Initial opening
Step 8
15 sec.
Inverter compressor (INV.)
(M1C)
Electronic expansion valve
(Y1E: Main)
Inverter fan
(M1F)
Four way valve
(Y3S)
OFF
OFF
Step 4
15 sec.
0 pls
1375 pls
0 Hz
+4
→
+7
→
+5 Step / 20 sec.
52 Hz
+1 Step / 15 sec. (when Pc > 2.16 MPa)
-1 Step / 15 sec. (when Pc < 1.77 MPa)
Inverter compressor (INV.)
(M1C)
Electronic expansion valve
(Y1E: Main)
Inverter fan
(M1F)
Four way valve
(Y3S)
[Ending conditions]
OR
· A lapse of 90 sec.
· Pc-Pe > 0.39MPa.
Summary of Contents for RQYQ140-180PY1
Page 216: ...Piping Diagrams SiBE341001 207 Appendix 1 2 BS Unit BSVQ100 160 250PV1 4D057985B...
Page 217: ...SiBE341001 Piping Diagrams Appendix 208 BSV4Q100PV1 3D064148...
Page 218: ...Piping Diagrams SiBE341001 209 Appendix BSV6Q100PV1 3D064149...
Page 220: ...Wiring Diagrams for Reference SiBE341001 211 Appendix 2 2 BS Unit BSVQ100 160 250PV1 3D055928C...
Page 221: ...SiBE341001 Wiring Diagrams for Reference Appendix 212 BSV4Q100PV1 3D063928B...
Page 222: ...Wiring Diagrams for Reference SiBE341001 213 Appendix BSV6Q100PV1 3D063929B...
Page 223: ...SiBE341001 Option List Appendix 214 3 Option List 3 1 Option Lists Outdoor Unit 3D066354...
