Chapter 3: Connecting to the unit
[Warning]
In case of long term logging or using in the outdoor under rainy weather, please take appropriate
countermeasure for protection from rainwater to avoid electric shock or fire.
D3-NET connection wire
TYPE4
checker box
VRV
PC
USB cable (included)
[Connection procedure]
(1) Connect with D3-NET connection wire prepared in 1-2 Preparation part in this manual.
Please connect wire to D3-NET terminal of checker first. (If connect to D3-NET terminal of VRV and F1-F2
will be short-circuited, unit could be damaged)
(2) Connect another end of D3-NET connection wire to communication terminal (F1-F2) of VRV unit.
[Warning]
Please connect to communication terminal of VRV (outdoor unit or indoor unit) or centralized
controller. If it would be connected to power terminal, there is a possibility of fatal accident by
electric shock or damage of the unit.
[Caution]
1. It’s not necessary to correspond F1
-F2 of the transmission terminal of VRV to F1-F2 of the
checker like F1-F1 or F2-F2 respectively (no polarity).
2. Recommended connection point of VRV unit is F1-F2 terminal of OUT-OUT connection of outdoor
unit, but it can be connected to indoor unit or centralized controller.
3. In case of connecting to indoor unit, please connect to the last indoor unit of the line to avoid
sub-branching.
4. To extend wiring length (up to hundreds of meters), it could cause affection to the unit’s
operation. Please be aware of electric interference such as taking enough distance from power line.
AS0112-P-DENV
15
3-1 D3-NET (F1,F2) connection
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