Appendix
Si39-303
144
General Information
7.12 Bad Examples and Good Examples in Installation
7.12.1 Example 1:
Signal interference due to use of multiple core cable
(all
model)
Situation
Although for the purposes of group control there are only 2 units per group there are transmission
malfunctions between the indoor units and the remote controller and the remote controller’s address
display is showing non-existent addresses such as 13 or 15.
Source of
Problem and
Remedial Action
Multiple core cable has been used
for at least part of the interconnecting wiring between the remote
controller and the indoor units.
This has resulted in signal interference leading to a transmission malfunction.
The multiple core cable was replaced by twin core cable and the fault disappeared.
Main Points
!
Although twin core cable had been run from each unit, multiple core cable was used on the way.
!
In schools, etc., because remote controllers are often installed in a single first floor control room, it is
easier to use a multi-core cable.
!
Signal interference can result in non-existent addresses appearing on the display.
Summary of Contents for VRV II Series
Page 6: ...Si39 303 iv Table of Contents...
Page 31: ...Si39 303 Installation General Information 25 Flaring Procedure...
Page 124: ...Appendix Si39 303 118 General Information 3P114237A...
Page 141: ...Si39 303 Appendix General Information 135 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 4D040338A...
Page 142: ...Appendix Si39 303 136 General Information RXYQ14MY1B RXYQ16MY1B 4D040339A...
Page 144: ...Appendix Si39 303 138 General Information 7 11 Wiring Diagrams 7 11 1 Outdoor Unit RXYQ5MY1B...
Page 145: ...Si39 303 Appendix General Information 139 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 3D038582...
Page 146: ...Appendix Si39 303 140 General Information RXYQ14MY1B RXYQ16MY1B 3D038058...
Page 147: ...Si39 303 Appendix General Information 141 7 11 2 Field Wiring RXYQ5 16MY1B 3D040746...
Page 148: ...Appendix Si39 303 142 General Information RXYQ18 32MY1B 3D040747...
Page 149: ...Si39 303 Appendix General Information 143 RXYQ34 48MY1B 3D040748...
Page 158: ...Appendix Si39 303 152 General Information...
Page 180: ...Refrigerant Piping Si39 303 174 Installation Manual...
Page 226: ...Troubleshooting Si39 303 220 Operation Manual...