Rittal 1194.42 Series, Assembly And Operating Instructions Manual

Page: 4 / 13

5 Commencing operation and control behavior
page 4 of 13 Rittal cooling unit assembly and operating instructions
5.1.2 Editable parameters
Param.
Type Display
screen Parameter Min.
value Max.
value Factory
setting Description
F PS Password 0 99 22 Protection code for modifying the configu-
ration parameters (default=22). The value
of the password can be customized from
the supervisor
S St Setpoint r1 r2 35 :r1 minimum value and r2 maximum
value of the set point. Parameter St de-
termines the desired temperature to be
maintained inside the cabinet or cold
room (set point).
F rd Regulation diffe-
rential 0 +19 5 Value that is added to (or subtracted
from, i
n „reverse‟ mode) the temperature
set point.
rd= low values:

more precise temperature control;

high compressor On/Off switching
frequency in the event of minimum.
Temperature deviations (with the risk
of causing damage).
rd= high values:

less precise temperature control;

low compressor On/Off switching
frequency in the event of minimum
temperature deviations.
Important: the compressor can also be
safeguarded using the parameters that
limit the number of activations/hour and
the minimum off time
C r1 Setpoint min.
value 20 r2 30 r1 & r2 :set the range of temperatures
for setting the set point.
C r2 Setpoint max.
value r1 50 45
C cc Continuous cycle
period 0 15 1 (hours) ?
C A0 Alarm and fan
differential -20 +20 2 See chapter 5.2
F AH Alarm maximum
temp. -50 +99 10 See chapter 5.2
C Ad1 Delay for high and
low temp. alarm 0 199 30 Delay for high temperature alarm when
power on just before. When alarm condi-
tion is achieved but power on just before ,
the timer start to count for a specify value
(Ad1). Only the time elapsed, alarm relay
can be active
5.1.3 Parameter navigation
The operating parameters, modifiable using the key-
pad, are divided into two types: frequent (type F) and
configuration (type C). Access to the latter is pro-
tected by password (default= 22) to prevent acciden-
tal or un-authorized modifications.
Accessing the type F 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);

use the UP and DOWN buttons to scroll the pa-
rameters. The LED corresponding to the catego-
ry of parameters will be on (see parameters list)

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 proce-
dure for any other parameters that need to be
modified;

press the SET button for more than 3 s to per-
manently save the parameters and exit the pa-
rameter setting procedure.
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);