Installer Mode; Entering Installer Mode; Fail-Safe Mode Setup - Hitachi ATW-RTU-02 Installation And Operation Manual

3. Installer Mode

Installer Mode is used to alter the system settings for specific applications, to use the special features
of the Room Unit in a different way or to alter the factory preset parameters. Parameters are divided
into two groups:
- Category 1 parameters – Room Unit Setup
- Category 2 parameters – System Setup.
These are all listed in section 3.5 Installer Parameters Table.

3.1 Entering Installer Mode

1
1 2 3
1..6
Press the button.
Press and hold the
PROGRAM &
3
Press the or to
change factory setting.
The display will flash
indicating that a change
has been made.
5
Press button
to go to the next
parameter.

3.2 Fail-Safe Mode Setup

The fail-safe mode defines the system status if the RF communication is lost (e.g. when the Room Unit
stops communicating due to discharged batteries). If the system is a direct (radiator one), then the
factory setting will make the system revert to a set point of 10°C for frost protection. If indirect loops are
added, the system will continue to operate at the last communicated setpoint.
4 5 6 7
MANAUTO
2
1
button and the
buttons together.
Installation and Operation Manual
2
2
The unit will display the first parameter of installer
parameter group category 1 (from Parameter n.1
to n.19) as shown
4
Press the green
button to confirm the
change.
The display will stop
flashing.
6
Press the
group category 2 ( ) (from Parameter n.4 to n.14).
7
To exit the installer mode press the
buttons.
button to go to Installer parameter
7
or