Unit Controller - Hitachi YUTAKI S Series Instruction Manual

UNIT CONTROLLER

In case of test run, user can also select the mode of the test
(cooling or heating).
When user confirms the test run or the air purge, the YUTAKI
user controller sends the order to the indoor.
During the execution of this test, the following screen is shown:
• When the test starts, the user controller will exit from the
installer mode.
• User can cancel the test run regardless of the time left for
test finishing.
• The Test Run icon is shown in the notifications zone, but the
notification of this test run is taken from H-LINK.
When test run has finished, an information message is displayed
in the screen, and pressing accept, the user returns to the global
view.
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N O T E
• When commissioning and installing the unit, it is very important to use
the "Air purge" function to remove all the air in the water circuit. When
the air purge function is running, the water pump starts the automatic
air venting routine which consists of regulating the speed and open/
close configured 3-way valve to help to evacuate air from the system.
• For Outdoor test run, refer to Outdoor Unit Installation Manual.
• If there is a Heater or a Boiler installed, disable the operation before
running the test run.
8 UNIT CONTROLLER
8.1 DEFINITION OF THE SWITCHES


28 PMML0574 rev.0 - 09/2021
Liquid Crystal Display

Screen where controller software is displayed.
OK button

To select the variables to be edited and to confirm the
selected values.
Arrows key

It helps the user to move through the menus and views.
Run/Stop button

It works for all zones if none of the zones is selected or only
for one zone when that zone is selected.
Return button

To return to the previous screen.
8.2 MAIN VIEW
Main view of the device is composed by a bottom tab widget to
move around the different views:
• Home
• Mode
• Room 1 (if space is small it shows R1)
• Room 2 (if space is small it shows R2)
• Circuit 1 (if space is small it shows C1)
• Circuit 2 (if space is small it shows C2)

• Fan 1 (if space is small it shows F1)
• Fan 2 (if space is smaill it shows F2)
• DHW
• SWP
• Menu

