Cooling Function; Semi-Automatic Defrosting; Application; Bus Address - AHT MACAO Serie Manual De Instrucciones

5 | Control and display elements
NOTICE
Property damage caused by making incorrect
changes to the operating element parameters.
▪
After operating, reattach the Plexiglas cover.
The following keys are available as operating elements:
Fig. 1: Operating elements and display indicators
No. Key
1
2
3
No. Display
Illuminated red
4 dot (next to the Alarm
klaxon symbol)

5.2.1 Cooling function

Press
Switch off cooling
function (start de-
onds.
frosting manually)
display.
Press
Switch on the cool-
onds.
ing function
The interior temperature ap-
pears on the display.

5.2.2 Semi-automatic defrosting

Press
Start semi-automatic
onds.
defrosting
Defrost time
–
Up to 99 min.
After semi-automatic defrosting, the appliance automat-
ically returns to normal operation.
The current interior temperature appears on the dis-
play.
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Function
–
Application change
–
Raise bus address
–
Start semi-automatic
defrosting
–
Start defrosting manu-
ally
–
Switch the cooling func-
tion on and off
–
Call error code (if red
dot illuminated)
–
Acknowledge acoustic
alarm
Meaning
for at least 3 sec-
appears on the
for at least 3 sec-
for at least 3 sec-
appears on the display.
AHT Cooling Systems GmbH | en
24-hour defrost block
The 24-hour defrost block is active if briefly appears
on the display, followed by the interior temperature.

5.2.3 Application

The following applications can be selected (customer-
specific release):
Briefly press
Display selected ap-
The currently selected
plication
application appears
on the display, e.g.
If no change is required, the display returns to the
temperature display after approx. 5 seconds.
By pressing the
several times, you can run
Change application
through all applications re-
leased.
The applications newly set will
be set automatically approx. 5
Use new entry
seconds after pressing the the
button for the last time.

5.2.4 Bus address

Before assigning the bus addresses, the appliances
(1, 2,...n) must be networked with an appropriate bus
cable.
The first appliance (1) must be connected to market
monitoring (M) via the bus cable.
The bus cable must be terminated with a terminating
resistor (R) on the last device (n).
Fig. 2: Bus system diagram
For technical data, see → Technical data
Fig. 3: RJ45 connector bus cable, RJ45 sockets device and
terminating resistor (R)
Pin
1 A / -
2 B / +
3 Ground
The controllers are supplied as standard with bus ad-
dress "1" (corresponds to a stand-alone appliance).
To identify several appliances in the bus system, the
bus addresses must be assigned starting with "1".
.
button
Data Colour
Orange/white
Orange
Green/white
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