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ESIE06-05 Functional Control for a Standalone Unit

Part 2 – Functional Description 2–145

DICN (network): Overview

Introduction DICN = Daikin Integrated Chiller Network

Also referred to as master-slave system.

Remark: In a DICN system (Master-Slave), all the PCASO-controllers must have the same software,

bios, and boot version!

Function

description

To activate the DICN function MS Option must be set to "Yes" in the Service/DICN menu. In the user

settings menu of the master it must also be specified how many slave units are connected.

When activated, this function will transfer all parameters to the different units through F1/F2

communication line.

In DICN setup (when MS option is yes): the different units can be put in "normal" or "standby" mode

or in disconnected ON / OFF mode. When the mode is disconnected the unit selected will operates

as standalone units.

Remark: If the master is down (= no power) then a network safety is activated and all units will work

as standalone (no parameters are transferred), and they will work with their own setting in

the controller.

Overview of

possibilities

Basic principles:

■ Maximum four units can be combined in on DICN system.

■ Possible to combine all EWAQ-DAYN in one DICN.

■ Possible to combine all EWYQ-DAYN in one DICN.

Important:

■ It is not possible to combine Pco or Pco² and PCASO controllers in one DICN system.

■ When the user enters the service menu, the DIII communication stops.

■ When the user leaves the service menu, the DIII communication restarts.

■ It takes 10 minutes before DIII communication is fully re-established.

If communication fails after 10 minutes, the network safety error message “OU4:PCB COMM.

PROBLEM” appears.

DICN thermostat

function in cooling

The illustration below shows the thermostat inlet control in cooling mode for a DICN network.