Test Mode For The Basic Controller; Setting The Temperature; Resetting The Basic Controller; Control Using The E-Comfort Controller - Rittal SK 3302.100 Assembly And Operating Instructions Manual

6.1.3 Test mode for the Basic controller

The Basic controller is equipped with a test function
whereby the cooling unit commences cooling ope-
ration independently of the set temperature or door
limit switch function.
First you must dismantle the trim panel of the controller.
• Switch off the mains voltage.
• Remove the louvred grille or infill panel in which the
controller is installed.
• Release the display lock from behind and pull it
forwards slightly.
Fig. 33: Loosen the trim panel of the Basic controller
• Carefully raise the trim panel, e.g. using your
thumb or a flat screwdriver, and remove it.
You can now start test mode.
• Rotate the potentiometer to the left-hand stop, then
hold the rubberised potentiometer display down
while you re-connect the mains voltage.
The cooling unit will commence operation and the
green LED will flash (I_II_I_II_ . . .). Test mode is
completed after approximately 5 minutes. The unit
switches off and changes to normal operation.
Key
I = LED 500 ms on
_ = LED 500 ms off
In normal operation, the green LED is permanently
illuminated.
• Next, rotate the potentiometer back to the required
setpoint.

6.1.4 Setting the temperature

Note:
With the Basic controller, the temperature
is preset at the factory to +35°C. In order
to save energy, do not set the temperature
any lower than is actually necessary.
Rittal cooling unit assembly and operating instructions
To change the temperature setting:
• Dismantle the trim panel of the controller as
described in "6.1.3 Test mode for the Basic
controller", page 23.
• Set the required temperature on the temperature
setting device (Fig. 32, page 21).
• Carefully push the trim panel onto the display until
you hear it snap into place.
• Push the display back into the infill panel or louvred
grille.
• Re-attach the louvred grille or infill panel to the
cooling unit.

6.1.5 Resetting the Basic controller

Following a high-pressure alarm in the cooling cycle,
and once the cause has been rectified, you will need
to manually reset the Basic controller:
• Dismantle the trim panel of the Basic controller
as described in "6.1.3 Test mode for the Basic
controller", page 23.
• Press the reset button (Fig. 32, no. 5) for at least
3 sec.
The red LED is extinguished.
• Re-install the Basic controller.

6.2 Control using the e-Comfort controller

For unit types SK 33xx.5xx and SK 33xx.6xx.
1
4
Fig. 34: e-Comfort controller
Legend
1 Programming button, also display of the set
temperature unit (degrees Celsius)
2 Set button
3 Programming button, also display of the set
temperature unit (degrees Fahrenheit)
4 7-segment display

6.2.1 Properties

– Three voltage variants are supported:
– 115 V
– 230 V
– 400/460 V, 3-phase, supports multiple voltages
without rewiring
– Integral start-up delay and door limit switch
function
6 Operation
2
3
23
EN