This section outlines the differences between the FCU hardware versions and describes steps required to properly configure the controller. For further information, please see the iSMA-B-FCU Hardware manual.
The PROTOCOL DIP switch is responsible for configuring the communication protocol.
The MAC DIP switch is responsible for addressing the controller.
The CFG DIP switch is responsible for configuring the application.
Note: The detailed information about the DIP switches configuration is available in the FCU Hardware manual.
The iSMA-B-FCU controller configuration step by step is described in chapter 3 of this document and consists of steps:
Step 1: configuration of the PROTOCOL DIP switch responsible for selecting used protocol and its baud rate, and restoring the controller to the default settings;
Step 2: selecting the address of the controller by the MAC DIP switch;
Step 3: selecting the FCU pipe type;
Step 4: selecting 1 or 2 stages of heating;
Step 5: selecting 1 or 2 stages of cooling;
Step 6: selecting the type of control the FCU valves require, and heating and cooling actuators connection details;
Step 7: selecting the temperature control value source;
Step 8: selecting the type of fan used within the project.
Steps 3-8 describe configuration of the CFG DIP switch. Their overview with default positioning is presented in the table below.
Heating 2nd Stage
Cooling 2nd Stage
Heating/cooling control mode
WARNING! Before attempting to configure the controller, make sure to have acquainted with all the required documentation, or have a good knowledge of the fan coil unit application–this will make configuration of the controller easy-going and trouble-free.