AHT Cooling Systems GmbH | en-US
Switch on the appli-
ance lighting
Switch off the appli-
ance lighting
5.2.6
Bus address
a) Before assigning the bus addresses, the appli-
ances (1, 2, ...n) must be networked with an ap-
propriate bus cable.
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 termi-
nating resistor (R) on the last appliance (n).
Fig. 5: Bus system diagram
Technical data [see } Chapter 3.2]
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 (corre-
sponds to a stand-alone appliance) as standard.
d) Assignment of the bus addresses must begin with
as identification for several appliances in the bus
system.
Bus addresses must not be assigned twice.
We therefore recommend entering the addresses ac-
cording to the actual wiring sequence.
A maximum of 247 addresses are possible.
Press
Deactivate key lock
multaneously for 5 seconds.
(Access to level 1)
Level 1 is activated.
Accessing the programming level
– Switch off cooling function :
1.
Press
for at least 1 second.
appears on the display.
440195_1_0521
Briefly press.
appears on the display.
Briefly press.
goes out on the display.
3
Data
Color
A / -
Orange /White
B / +
Orange
Green/White
and
appears on the display.
– Then immediately press
in succession.
2.
appears on the display alternately with
the current bus address, e.g. .
Assign bus address
– Assign the next higher bus address (individual
step):
Briefly press
3.
– Quick run through the bus addresses:
Hold
– Apply new input:
Wait 5 seconds.
4.
appears on the display.
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).
– Switch the cooling function back on:
Press for at least 1 second.
5.
The current interior temperature appears on
the display.
Assign bus addresses for subsequent appliances:
e) Repeat steps 1 to 5 on each appliance and select
an available bus address.
5.2.7
Alarm
Display alarm
An error code appears on the display as a flashing in-
dication alternating with the interior temperature.
The symbol
appears on the display.
As an option, it is possible to output an acoustic
alarm by means of a built-in buzzer.
Call error code to
check
Troubleshooting measures for the occurrence of alarm
indicators; see [see } Chapter 10.3].
si-
Error code
Sensor fault F1
Sensor fault F2
Sensor fault F4
Time/date fault
Overtemperature alarm
Control and display elements | 5
3 times briefly
.
pressed.
NOTICE
Briefly press.
The error code is shown on the
display for approx. 5 seconds.
The current interior temperature
is then shown again.
Meaning
39 / 104