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Daikin RXYQ5PY1 Service Manual: Bad Examples And Good Examples In Installation

Daikin r-410a heat pump 50hz/60hz cooling only 50hz.
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SiEN34-705

7.14 Bad Examples and Good Examples in Installation

7.14.1 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 control and the remote
control'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
Problem and
remote control and the indoor units.
This has resulted in signal interference leading to a transmission malfunction.
Remedial Action
5F
1F
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
! In schools, etc., because remote controls are often installed in a single first floor control
! Signal interference can result in non-existent addresses appearing on the display.
General Information
Relay box
Multiple core
cable
Relay box
way.
room, it is easier to use a multi-core cable.
To the outside
Indoor unit
(0000)
To the outside
Indoor unit
(0000)
Remote
Remote
control
control
Appendix
To the outside
Indoor unit
(0001)
Indoor unit
To the outside
(0001)
195

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