Special Control
Si39-504
80
Function
3.3
Defrosting Operation
To defrost the outdoor unit heat exchanger while in heating operation, the defrost operation is conducted to recover the
heating capacity.
[Start conditions]
Referring to the set conditions for the following items, start the defrosting operation.
• Heat transfer coefficient of the outdoor unit heat exchanger
• Heat exchange temperature (Tb)
• Timer (Set to two hours at minimum.)
Furthermore, the heat transfer coefficient of the outdoor unit heat exchanger is computed from Tc, Te, and compressor
loads.
*
In the case of multi-outdoor-unit system,
Master unit: Performs the operations listed in the table above.
Slave units: Operating units perform the operations listed in the table above.
Non-operating units perform the operations listed in the table above from the Defrost operation.
(Non-operating unit stops during “Defrost preparation operation”.)
*
Actuators are based on RXYQ16MA.
Outdoor unit actuator
Defrost preparation
operation
Defrost operation
Post Defrost operation
Compressor
Upper limit control
143 Hz + ON + ON
1-step increase from
(74 Hz + OFF + OFF) to
(Pc - Pe>0.4 MPa)
Outdoor unit fan
STEP7
or
STEP8
OFF
STEP8
Four way valve
ON
OFF
ON
Main motorized valve (EV1)
SH control
2000 pls
200 pls
Subcooling motorized valve (EV2)
0 pls
0 pls
0 pls
Hot gas bypass valve (SVP)
OFF
ON
ON
Receiver gas discharging valve
(SVG)
OFF
OFF
OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON
ON
ON
Ending conditions
130 sec.
•
12 min.
•
Ts >11
°
C
•
160 sec.
•
Pc - Pe>0.4MPa
or
or
Indoor unit actuator
During defrost
Fan
Thermostat ON unit
OFF
Stopping unit
OFF
Thermostat OFF unit
OFF
Electronic expansion valve
Thermostat ON unit
512 pls
Stopping unit
512 pls
Thermostat OFF unit
512 pls
Содержание VRV II RXYQ5MATL
Страница 20: ...Si39 504 Specifications 9 Part 2 Specifications 1 Specifications 10 1 1 Outdoor Units 10 1 2 Indoor Units 21...
Страница 53: ...Specifications Si39 504 42 Specifications...
Страница 56: ...Si39 504 Refrigerant Circuit Refirgerant Circuit 45 RXYQ5MA 3D048203 2 4 3 5 K J S E D M T N P A G O 1 W V...
Страница 115: ...Outline of Control Indoor Unit Si39 504 104 Function...
Страница 161: ...Field Setting Si39 504 150 Test Operation...
Страница 172: ...Si39 504 Troubleshooting by Remote Controller Troubleshooting 161...
Страница 265: ...Piping Diagrams Si39 504 254 Appendix 1 Piping Diagrams 1 1 Outdoor Unit RXYQ5MAYL E TL E 3D048203...
Страница 266: ...Si39 504 Piping Diagrams Appendix 255 RXYQ8MA 10MA 12MAYL E TL E 3D048033A...
Страница 267: ...Piping Diagrams Si39 504 256 Appendix RXYQ14MA 16MAYL E TL E 3D048034A...
Страница 271: ...Wiring Diagrams for Reference Si39 504 260 Appendix RXYQ8MA 10MA 12MAYL E 3D047088C...
Страница 272: ...Si39 504 Wiring Diagrams for Reference Appendix 261 RXYQ14MA 16MAYL E 3D047089C...
Страница 273: ...Wiring Diagrams for Reference Si39 504 262 Appendix 2 1 2 RXYQ MATL E RXYQ5MATL E 3D049059A...
Страница 274: ...Si39 504 Wiring Diagrams for Reference Appendix 263 RXYQ8MA 10MA 12MATL E 3D049060A...
Страница 275: ...Wiring Diagrams for Reference Si39 504 264 Appendix RXYQ14MA 16MATL E 3D049061A...
Страница 277: ...Wiring Diagrams for Reference Si39 504 266 Appendix RXYQ18MA 20MA 22MA 24MA 26MA 28MA 30MA 32MAYL E 3D040747H...
Страница 278: ...Si39 504 Wiring Diagrams for Reference Appendix 267 RXYQ34MA 36MA 38MA 40MA 42MA 44MA 46MA 48MAYL E C 3D040748H...
Страница 279: ...Wiring Diagrams for Reference Si39 504 268 Appendix 2 2 2 RXYQ MATL E RXYQ5MA 8MA 10MA 12MA 14MA 16MATL E 3D041990A...
Страница 280: ...Si39 504 Wiring Diagrams for Reference Appendix 269 RXYQ18MA 20MA 22MA 24MA 26MA 28MA 30MA 32MATL E 3D041991A...
Страница 281: ...Wiring Diagrams for Reference Si39 504 270 Appendix RXYQ34MA 36MA 38MA 40MA 42MA 44MA 46MA 48MATL E 3D041992A...
Страница 282: ...Si39 504 Wiring Diagrams for Reference Appendix 271 2 3 Indoor Unit FXCQ20M 25M 32M 63MVE 3D039556A...
Страница 283: ...Wiring Diagrams for Reference Si39 504 272 Appendix FXCQ40M 50M 80M 125MVE 3D039557A...
Страница 284: ...Si39 504 Wiring Diagrams for Reference Appendix 273 FXFQ25M 32M 40M 50M 63M 80M 100M 125MVE 3D039600A...
Страница 285: ...Wiring Diagrams for Reference Si39 504 274 Appendix FXKQ25M 32M 40M 63MVE 3D039564B...
Страница 286: ...Si39 504 Wiring Diagrams for Reference Appendix 275 FXDQ20N 25N 32N 40N 50N 63NVE with Drain Pump 3D045500C...
Страница 287: ...Wiring Diagrams for Reference Si39 504 276 Appendix FXDQ20N 25N 32N 40N 50N 63NVET without Drain Pump 3D049604A...
Страница 288: ...Si39 504 Wiring Diagrams for Reference Appendix 277 FXSQ20M 25M 32M 40M 50M 63M 80M 100M 125MVE 3D039561A...
Страница 289: ...Wiring Diagrams for Reference Si39 504 278 Appendix FXMQ40M 50M 63M 80M 100M 125MVE 3D039620B...
Страница 290: ...Si39 504 Wiring Diagrams for Reference Appendix 279 FXMQ200M 250MVE 3D039621B...
Страница 291: ...Wiring Diagrams for Reference Si39 504 280 Appendix FXHQ32M 63M 100MVE 3D039801D...
Страница 292: ...Si39 504 Wiring Diagrams for Reference Appendix 281 FXAQ20M 25M 32MVE 40M 50M 63MVE 3D034206C...
Страница 309: ...Selection of Pipe Size Joints and Header Si39 504 298 Appendix Note 1...
Страница 315: ...Method of Replacing The Inverter s Power Transistors and Diode Modules Si39 504 304 Appendix...