Airwell MQL 6 [19/40] Control system
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Airwell MQL 6 [19/40] Control system

Airwell MQL 15 [19/40] Control system
Doing this, you can display the shop setting,
which is 12 °C. This setting can be increased or
decreased by scrolling its value up or down,
through the relevant keys.
Once the desired value has been displayed, sim-
ply press both keys for 2 seconds to accept it and
to go back to the previous level. If you scroll the
text, the “HEA” message is displayed and the
heating set point can be modified through the
same procedure adopted to modify the cooling
set point.
At the end of the setting process, you can go back
to the first level, by holding both keys down for
2 seconds, as described in the paragraph “User
Interface”.
4) To display other useful temperatures, go
to level 1 as described above and then scroll the
display up until the “tp” message is displayed;
then, repeat the procedure in order to go to the
lower level. At this point, scroll the display until
the t01, t02, t03 messages appear.
Going to the next level, while the t02 message is
being displayed, allows you to display the leav-
ing water temperature, while repeating this opera-
tion when the tp03 message appears allows you
to display the surface temperature of the coil.
5) The unit is shop-preset for summer/winter switch-
ing with the keyboard. If a remote summer/
winter switching contact has been provided,
it is necessary to switch the H27 software parame-
ter to re-configure the unit accordingly.
To do this, press the two keys at the same time, so
as to go to the upper level, and then scroll the dis-
play up until the “Par” message appears. Press
the two keys again at the same time, so as to go to
the upper level, and then scroll the display up until
the “Cnf” message appears; then repeat this oper-
ation to go to the upper level.
Once you have reached this level, scroll the dis-
play up until the “H27” message appears, and
then press the two keys again to reach the lower
level.
At this point, modify the setting of the parameter
from 0 to 1. Confirm the change and repeat the
procedure (holding the keys down for two sec-
onds), in order to go back to the first level.
Page 18
6 MINICHILLER CONTROL
6.1 Operating instructions
6.1.1 Before start-up
Before starting the equipment:
1) Turn on the master switch of the power line.
2) For an ideal heating of the oil in the compressor’s
cup and for a proper removal of the refrigerant
from the oil, the operation described in sub-para-
graph 1) above should be performed several
hours before the actual start-up of the equipment.
6.1.2 Starting and using the Unit
To properly use the unit in full safety, please read
and understand the instructions provided below.
1) To start the unit, press the key for two
seconds ; the unit will stop if you carry out the
same operation while it is running. When the
equipment does not work, the control system’s dis-
play shows a red hyphen or the message “E00”,
if a remote Run/Stop contact has been provided.
2) If the unit is of the heat pump type, the key
makes it possible to select either the cooling or the
heating mode.
When you press this key, the mode cyclically
switches from standby to cooling, heating, stand-
by etc. The cooling mode is highlighted by the
lighting-up of the LED positioned under the
ideogram, while the heating mode is highlighted
by the lighting-up of the LED positioned under the
ideogram.
3) To modify the set-points, press both keys at
the same time.
When the “Set” message appears on the display,
this operation must be repeated to go to the next
level. Scroll the text on the display up or down, in
order to display the “Coo” and “HEA” messages
alternatively. The heating set point can be modi-
fied by pressing both keys at the same time, so as
to switch to the next level.
Control System
Manuale MQL-MQH 10.6.2005 12:26 Pagina 18

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