5 | Control and display elements
Press
Switch on the cool-
The interior temperature ap-
ing function
pears on the display after a few
seconds.
When the cooling function is switched off, the door
heating is automatically switched off as well.
a) After switching on the cooling function, the door
heating must therefore be switched on again sep-
arately.
5.3.3
Application
The following applications can be selected (enabled to
specific customer requirements):
–
,
Press
Deactivate key lock
simultaneously for 5 seconds.
(Level 1 access)
Level 1 is activated.
Press
second.
Display selected ap-
The application currently set ,
plication
e.g.
play.
If no change is desired, the display returns to the in-
terior temperature after a short period of time.
Change application
The newly set application is ad-
Use new entry
opted automatically after 5
seconds.
5.3.4
Semi-automatic defrosting
Press
Deactivate key lock
simultaneously for 5 seconds.
(Level 1 access)
Level 1 is activated.
Press
Start semi-automatic
defrosting
on the display.
Defrost time
– Up to 60 min
24-hour defrost block
If
appears briefly and then the interior temperat-
ure on the display, the 24-hour defrost block is active.
End of semi-automatic defrosting
After semi-automatic defrosting, the appliance auto-
matically returns to normal operation.
The current interior temperature appears on the dis-
play.
5.3.5
Bus address
a) Before assigning the bus addresses, the appli-
ances (1, 2, ...n) must be networked with an ap-
propriate bus cable.
44 / 788
for at least 1 second.
and
appears on the display.
for at least 1
appears on the dis-
press briefly .
and
appears on the display.
for at least 3 seconds.
and the
icon appears
b) The first appliance (1) must be connected to mar-
ket monitoring (M) via the bus cabling.
c) The bus cabling must be terminated with a termin-
ating resistor (R) on the last appliance (n).
Fig. 5: Bus system diagram
Technical data
Bus cable
Patch cable CAT 5-S/FTP
PROTOCOL MODBUS RTU
Bus system (Op-
RS-485 2-WIRE
tional)
Connection via RJ45 socket/
RJ45 plug
Baudrate
19200 bit/s
Data Lenght
8-bit
Parity
even
Stop bit
1
Minimum TimeOut
60 ms
1
2
5
4
6
Fig. 6: RJ45 bus cable plug (1), RJ 45 sockets (2), terminat-
ing resistor (R) (3), pin 1 (4), pin 2 (5), pin 3 ( 6)
Pin
1
2
3
Ground
The controllers are supplied with bus address as
standard (corresponds to a stand-alone appliance).
d) Assignment of the bus addresses must begin with
as identification for multiple appliances in the bus
system.
Bus address must not be assigned twice.
We therefore recommend that you enter the ad-
dresses according to the actual wiring sequence.
A maximum of 247 addresses are possible.
NOTICE
Property damage as a result of assigning the
bus address by deactivating the cooling func-
tion.
§ After assigning the bus address, the cooling func-
tion has to be switched on again (see → item 5).
AHT Cooling Systems GmbH | en
3
Data
Colour
A / -
Orange /White
B / +
Orange
Green/White
376840_1_0920