9We reserve the right to make technical changes | 83055600dUK – Translation of the original instruction manual (HMD 2) | ait-deutschland GmbH
After that, the following screen appears:
NOTE
The heating phase until the compressor starts can take
several hours when starting up for the rst time.
With dual air/water heat pumps the ow is monitored
while the pump is running. If the ow is not ok, the heat
pump does not start up and no error is displayed. To this
end, check the ASD input, if it is not set to ON the ow is
too low.
page 16, “Query inputs“
FIX STARTUP PARAMETERS
With installer or customer service access, it is possible to save the
settings made during commissioning (= startup guide). This al-
lows you to quickly and easily reset the system to the status it had
at startup.
The data is stored on the circuit board of the control unit.
Follow the instructions on the screen and save the set-
tings.
You can also save the settings to an external USB stick.
RESET STARTUP PARAMETERS
If your heat pump was commissioned by an authorised customer
service partner and the startup parameters have been stored, you
can use this menu item to restore these parameters.
This may be helpful if settings have been changed and let to a
system malfunction. Please Notice that all settings such as heat-
ing curves, system settings, set values will be reset to the values
applicable at commissioning.
The programmed switching times are not aected by this.
You will be guided through the following menu items:
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