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6.1.2 Main menu
The main menu consists of a rotary menu with 7 icons.
Control
The control menu will allow for the user to change basic
parameters and operation status of the unit.
The unit can be started or stopped
The fan speed can be selected; three manual speeds + one
auto speed
Post heating, post cooling and free cooling setpoints can be
changed.
Alarm
Alarms are displayed on the main screen of the HMI. Active
alarms can be viewed in this menu. All the alarms can be reset.
A fault can be traced by examining the function or functional
component indicated in the alarm text. More information
about the individual alarms, see section 8.0
If the fault cannot be immediately remedied:
Consider whether the air handling unit can continue to operate
until the fault has been remedied.
Time schedule
The built-in timer enables you to control the AHU's operat-
ing mode/time. Certain other oversteering functions such as
external timer, communication, etc. affect the preset operat-
ing modes.
The controller allows 6 time slots (channels) to be
configured.
Time and date
The current date and time must be set and adjusted
after the commissioning and later on if needed. The timer
automatically takes leap years into consideration. .
Time schedule
Times and days can be set when the air handling unit is
to run in the high speed mode, medium speed mode, low
speed mode or be switched off. For each day (Monday -
Sunday), six different time slots can be configured. The
time slots are subsequent.
Seasonal management
The seasonal management menu allows for the deacti-
vation of heating coils, cooling coils and bypass freecool-
ing function based upon a year calendar. In between the
programmed interval, the selected function is OFF.
Operation and maintenance instructions
29
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