FRIEDHELM LOH Rittal 1194.42 Series, Assembly And Operating Instructions Manual

Page: 5 / 28

5 Commencing operation and control behavior
Rittal cooling unit assembly and operating instructions page 5 of 28
Accessing the type C parameters:
 Press the SET button for more than 3 s (if there
are active alarms, mute the buzzer), the display
shows the parameter code “PS” (password);
 press the SET button to access the password
setting; use the UP and DOWN buttons to scroll
the numbers until displaying “22” (password to
access the parameters);
 press the SET button to confirm the password ;
 use the UP and DOWN buttons to scroll the pa-
rameters. The LED corresponding to the cate-
gory of parameters will be on (see Below Table);
 press SET to display the value associated with
the parameter increase or decrease the value us-
ing the UP or DOWN button respectively;

press SET to temporarily save the new value and
display the parameter again;
 repeat the procedure for any other parameters
that need to be modified;

press the SET button for more than 3 s to perma-
nently save the parameters and exit the parame-
ter setting procedure.
Accessing the type S parameters:
 press SET for 1 s, the set value will start flashing;
 increase or decrease the value using UP or
DOWN;
 press SET to confirm the new value.
5.1.4 Setting the target temperature
The temperature is preset at the factory to 35
℃
.
 press SET for 1 s, the set value will start flashing;

increase or decrease the value using UP or
DOWN;
 press SET to confirm the new value.
5.1.5 Setting the temperature range
 Press the SET button for more than 3 s (if there
are active alarms, mute the buzzer), the display
shows the parameter code “PS” (password);
 press the SET button to access the password set-
ting; use the UP and DOWN buttons to scroll
the numbers until displaying “22” (password to ac-
cess the parameters);
 press the SET button to confirm the password;
use the UP and DOWN buttons to scroll the pa-
rameters.
 press SET to display the value associated with the
parameter increase or decrease the value using
the UP or DOWN button respectively;
 press SET to temporarily save the new value and
display the parameter again;
 repeat the procedure for any other parameters
that need to be modified;
 press the SET button for more than 3 s to perma-
nently save the parameters and exit the parameter
setting procedure.
Notice!
It is not allowed to change the value for
„r1 & r2“ without Rittal authorization
5.1.6 Controller display
Figure 2: Controller display
function
Normal operation Start up
no. on off flash
1 compressor on off call on
2 digits
two digits with sign and decimal
point, -99 to 99(*).
Notice!
The parameters that feature three digit
values can be set from the supervisor. In
this case the display will show “---“
5.1.7 Display buttons
Figure 3: Display buttons
no.
Normal operation
Start up/ reset
Pressing the button alone
1
more than 3 s: switch the
compressor ON/OFF
-
2
 1 sec: displays/sets
the set point
 more than 3 sec.: ac-
cesses the parameter
setting menu (enter
password 22)

mutes the audible
alarm (buzzer)
-
pressed
together (2
and 3) acti-
vate parame-
ter reset pro-
cedure
Start up/ reset to factory setting parameters
 Disconnect power supply