Unit Controller - Hitachi YUTAMPO TAW-190NHB Installation And Operation Manual

UNIT CONTROLLER

9 UNIT CONTROLLER
9.1 DEFINITION OF THE SWITCHES



9.2 DESCRIPTION OF THE ICONS
9.2.1 Common icons
Icon Name
State of DHW heating
operation
Progress of DHW
heating operation
88 Setting temperature
Alarm
Timer
Derogation
Installer mode
Menu lock
Outdoor air
temperature
DHW Heater
Defrost
Control mode
(Local/Full)
Forced OFF
Anti-legionella
operation
DHW boost operation
Night shift
12 PMML0451 rev.2 - 03/2018


OK

Values
DHW is ready (Thermo-OFF).
DHW is being heated up (Themo ON).
DHW heating operation has been stopped by unit controller button or by timer.
DHW heating operation is in Thermo-OFF.
DHW heating operation has reached 0~33% of the selected water outlet temperature.
DHW heating operation has reached 33~66% of the selected water outlet temperature.
DHW heating operation has reached 66~100% of the selected water outlet temperature.
Value Setting temperature of DHW heating operation
There is an alarm. The alarm code is shown next to this icon.
Simple timer
Weekly timer
The current operation settings have been manually modified with respect to those of the active
timer program.
The unit controller is in installer mode, which has special privileges.
The menu is being blocked from a central control. This icon disappears when indoor
communication is interrupted.
The outdoor air temperature is indicated next to this icon.
The DHW Heater is in operation.
Defrost function is active.
- Operation in local control mode when no icon is displayed
Operation in central control mode
This icon is displayed under each setting item turned to OFF, in case that the forced OFF input is
configured and its signal is received.
Anti-legionella operation is active
DHW boost operation is active.
Informs about night shift operation
LCD screen

OK button

It is used to select the parameters to adjust and to confirm the
selected values.
Arrow key

It is used to navigate through the menus and screens.
Run/Stop button

Menu button

It is used to display the different configuration options of the
controller.

Return button

It is used to return to the previous screen.
Favourite button

It is used as a shortcut to execute the preset favourite action
(Timer, Night shift or DHW) directly.
Explanation