Daikin REYQ96MTJU, Design, Installation & Testing Instruction, Page: 129 / 236

Si39-406 Appendix
General Information 123
7.10 Bad Examples and Good Examples in Installation
7.10.1 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.