Bad Examples And Good Examples In Installation - Daikin VRV II Series Design, Installation & Testing Instructions

Appendix

7.12 Bad Examples and Good Examples in Installation

7.12.1 Example 1:
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
Multiple core cable has been used for at least part of the interconnecting wiring between the remote
controller and the indoor units.
Problem and
This has resulted in signal interference leading to a transmission malfunction.
Remedial Action
The multiple core cable was replaced by twin core cable and the fault disappeared.
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Main Points
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Signal interference due to use of multiple core cable
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.
Si39-303
(all
General Information