Daikin BRR9B1V1, Installation Manual

Page: 22 / 40

8 | Configuration
Installation manual
22
BRR9B1V1
Communication box
4P617761-1 – 2020.04
8 Configuration
The communication box is for connection to an outdoor unit only. Do NOT connect
any other types of units.
The communication box contains 2 PCBs (A1P, A2P). A1P is the PCB for
communication with the indoor unit, and A2P is the PCB for communication with
the outdoor unit and capacity up unit.
Communication settings (slave address, baud rate, parity and stop bits) MUST be
made for A1P and A2P.
In this chapter
8.1 Setting the addresses of outdoor units and indoor units...................................................................................................... 22
8.2 To set the addresses of the outdoor unit and capacity up unit ............................................................................................ 23
8.3 To set the addresses of the indoor units ............................................................................................................................... 24
8.4 Configuring the communication box...................................................................................................................................... 24
8.4.1 To configure the communication box PCB for the indoor units ........................................................................... 24
8.4.2 To configure the communication box PCB for the outdoor unit and capacity up unit ........................................ 26
8.1 Setting the addresses of outdoor units and indoor units
WARNING
▪
When opening the front plate of an outdoor unit during operation, be careful of a
rotating fan. The fan continues rotating for a while even after the operation is
stopped.
▪
Before turning ON the power supply, make sure that the operation switch of the
outdoor unit is turned OFF. You can check this via the inspection hole of the
electrical component box (middle) of the outdoor unit.
▪
After turning ON the power supply, operate the push buttons and check the LED
indication via the inspection hole of the electrical component box (middle) of the
outdoor unit. Operating with the cover open might cause an electrical shock.
▪
For more information on how to configure the monitoring system (field supply),
see the manual of the supplier.
About the effective address range
Set an address in accordance with the model to be connected to the
communication box. The following table shows the numbers to which an address
can be set.
Model Effective address range
Outdoor unit + capacity up unit
(LRYEN LRNUN5A7Y1) 1-7
Indoor unit 1‑00 – 4‑15
INFORMATION
The numbers in the table show the effective range of address setting. For the
number of outdoor units that can communicate with 1 communication box, see the
specifications.
▪ The address of an outdoor unit and capacity up unit are the same.
▪ Setting an address outside the effective range disables proper communication.