Using The Appliance; Temperature Regulation; Cooling Unit Control (Cuc); Useful Suggestions - Dometic RH 131 Operating Instructions Manual

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5. Using the appliance

To start the refrigerator connect the plug into a
properly earthed socket.
The cooling fins should show signs of cooling after
about 3 hours. The refrigerator needs about 6 hours
at normal ambient temperature to reach 6 °C in the
storage compartment.

5.1. Temperature regulation

The usual setting required is in the region of 2 to 3 on
the thermostat knob (Fig. 5), but this can vary with
conditions of load and installation. If it is found
necessary to alter the setting,the knob can be turned
to a higher number to produce a colder temperature,
or a lower number to produce a warmer temperature.
The effect of any adjustment can be checked by
means of the thermometer after leaving the
refrigerator operating for a further period to settle
down again. The thermostat knob of the refrigerator
should not be set to "0" position. By setting the
thermostat knob to "0" position, the refrigerator will
still be live. If you do not want to use the refrigerator,
unplug it. If the thermostat knob is left in "0" position
for any longer period (a few hours), the cooling unit
control (CUC) will switch the appliance off.
The refrigerator can be restarted by unplugging and
then re-plugging the appliance.

5.2. Cooling unit control (CUC)

(Ser. No. starting with 634xxxxx or higher.)
The electronic checks the function after every
defrosting period (every 24 hours) by measuring the
evaporator temperature drop. If it registers a problem
the refrigerator will shut down and stops cooling. If this
happens you should check whether the refrigerator
has been overloaded, the thermostat knob is in "0"
position, that the door was properly closed, that the
cooling unit ventilation is correct and that the
refrigerator is levelled. After checking, unplug the
refrigerator at least for 10 seconds and plug it in again.
This resets the unit and it will function again. If no sign
of cooling there is a problem with the cooling unit and
you should contact Dometic service.
6. Useful suggestion
Do not overfill the appliance. Put warm foods and
drinks in the appliance only when they have cooled
6
Figure 5.
down to room temperature. It is advisable to leave
some space between the products in the cabinet to
ensure efficient and even cooling. If the shelves are
packed too tightly there may be unacceptable
temperature variations.
7. Defrosting, cleaning and
maintenance
Frost will gradually form on the cooling surfaces
and it must not be allowed to become too thick
since it acts as an insulator and interferes with the
cooling.
This frost-formation is kept back by the FUZZY
LOGIC system built into the appliance by switching
off the unit for two hours in every 24 hours. The
frost will melt and the defrost water will run through
the drain tube from the drip channel into an
evaporating vessel located at the bottom rear of the
refrigerator. (Fig 6) The defrost water will evaporate
automatically into the circulating air and the vessel
will not need emptying manually.
If we want to switch off the unit, turn the thermostat
knob to "0", disconnect the refrigerator from the
electricity supply and leave the cabinet door open.
After defrosting the cabinet interior should be
wiped out with a clean, damp cloth.
Figure 6.

7.1. Automatic defrost function

(Ser. No. starting with 634xxxxx or higher)
The first defrosting phase commences 39 hours
after the start and lasts for two hours.
After this, the device operates for 22 hours at a
time, followed by a defrosting period of 2 hours.

8. Changing the lightbulb

If the lightbulb needs changing, pull out the plug
and proceed as follows:
Press the metal reflector to one side and draw the
lamp covering backwards. Replace the bulb and
push the covering back into place.
A new 10-watt bulb can be obtained at any service
shop.

9. Reversing the door hang,

Lay the appliance on its back. Remove the 8
screws (1). Remove the door, together with the two
hinges (2), from the housing.
(If available)
(Fig. 7)