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Special Control
SiUS281811EA
110
Part 4 Functions and Control
3. Special Control
3.1 Startup
Control
This control is used to equalize the pressure in the suction and discharge sides of the compressor
prior to compressor startup, thus reducing startup loads. Furthermore, the inverter is turned ON to
charge the capacitor.
In addition, to avoid stresses to the compressor due to oil return, etc., after startup, the following
control is made and the position of the four way valve is also determined. To position the four way
valve, the master and slave units start up simultaneously.
Pc: High pressure sensor detection value
Pe: Low pressure sensor detection value
Ta: Outdoor air temperature
3.1.1 Startup Control in Cooling
Outdoor unit
actuator
Electric Symbol
Pressure equalization
control prior to startup
Startup control
18/24
class
30/36/42/48
class
STEP 1
STEP 2
Compressor
M1C
M1C
0 Hz
Minimum
frequency
Increases 2 steps every 20
seconds from minimum
frequency until
Pc – Pe > 0.39 MPa
(56.6 psi) is achieved
Outdoor fan
M1F
M1F
M2F
STEP 7
Ta < 20°C (68°F):
OFF
Ta
≥
20°C (68°F):
STEP 4
+1 step/15 sec. (when Pc >
2.16 MPa (313 psi))
–1 step/15 sec. (when Pc <
1.77 MPa (257 psi))
Main electronic
expansion valve
Y1E
Y1E
0 pulse
480 pulse (Fully
open)
480 pulse (Fully open)
Subcooling
electronic
expansion valve
—
Y3E
0 pulse
0 pulse
0 pulse
Four way valve
Y1S
Y1S
Holds
OFF
OFF
Hot gas bypass
valve
Y2S
—
OFF
OFF
OFF
Ending conditions
A lapse of 10 sec.
•
Pc – Pe < 0.3 MPa
(43.5 psi)
•
A lapse of 1 to 5 min.
OR
•
A lapse of 130 sec.
•
Pc – Pe > 0.39 MPa
(56.6 psi)
OR
Содержание SkyAir RZR-TA Series
Страница 1: ...Service Manual Cooling Only 60 Hz Heat Pump 60 Hz RZR TA RZQ TA Series SiUS281811EA...
Страница 202: ...SiUS281811EA 196 Part 6 Service Diagnosis 5 15 Fan Motor Connector Check for FTQ TA 311...
Страница 321: ...SiUS281811EA 315 Part 7 Appendix 1 Wiring Diagrams 316 1 1 Outdoor Unit 316 1 2 Indoor Unit 320 Part 7 Appendix...
Страница 322: ...Wiring Diagrams SiUS281811EA 316 Part 7 Appendix 1 Wiring Diagrams 1 1 Outdoor Unit RZR18 24TAVJU RZQ18 24TAVJU 3D115455...
Страница 323: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 317 RZR18 24TAVJUA RZQ18 24TAVJUA 3D124495...
Страница 324: ...Wiring Diagrams SiUS281811EA 318 Part 7 Appendix RZR30 36 42 48TAVJU RZQ30 36 42 48TAVJU 3D115456...
Страница 325: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 319 RZR30 36 42 48TAVJUA RZQ30 36 42 48TAVJUA 3D124500...
Страница 326: ...Wiring Diagrams SiUS281811EA 320 Part 7 Appendix 1 2 Indoor Unit FCQ18 24 30 36 42 48TAVJU 3D115647A...
Страница 327: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 321 FHQ18 24 30PVJU FHQ36 42MVJU 3D048116C...
Страница 328: ...Wiring Diagrams SiUS281811EA 322 Part 7 Appendix FAQ18 24TAVJU 3D114844B...
Страница 329: ...SiUS281811EA Wiring Diagrams Part 7 Appendix 323 FBQ18 24 30 36 42 48PVJU 3D065984J...