User Tips; Defrosting; Maintenance; Battery Voltage Sensor - Isotherm CR 42 Installation Et Mode D'emploi

solar panels are being used or when energy saving is not
required and a higher or lower refrigerator temperature
is desirable for some reason. The automatic function is
partially blocked, the temperature regulated by means
of the rheostat on the panel, clockwise for colder and
anticlockwise for warmer. "A" indicates the holding
plate temperature point for "accumulation". In the
"MAN.TEMP" position, the compressor starts and
runs in the fi rst hand in low speed to maintain the
temperature chosen and keep the noise on lowest
possible level. If the difference between chosen and
real temperature is more than 6°C (11°F),
will automatically speed up for faster cooling down. As soon
as this extra power is not needed, the compressor speed
will be reduced for lowest power consumption and keeping
selected temperature.
Indicator lights
Green:
Power is on, compressor standing.
Green+yellow:
Compressor running within the higher temperature
range. (Low voltage).
Green+red:
Compressor running with the lower temperature range.
(High voltage).
Green+yellow+red:
Compressor running at lowest possible speed to reach
selected temperature in MAN.TEMP mode.
Flashing yellow+red:
Error signal from electronic unit. Automatic start
attempt after 1 min.
Flashing yellow:
Low battery voltage sensor has switched off. Automatic
re-start occurs when engine is started to charge
batteries again.
There is a delay of up to 30 sec. before reactions after
panel operations.

2.3 User tips

- The freezer compartment is meant for short time
storage of pre-frozen food. It has not capacity for
quick or deep freezing.
- Start up the refrigerator if possible 6 hours before it
shall be loaded with food.
- When making ice in the ice tray, place it direct on the
evaporator and put nothing on top of the ice tray.
For quicker ice-making, turn the thermostat to
coldest position.
- Load the food inside the refrigerator in such a way, air
can circulate to equalize the temperature.
- Do not cover the shelves with glass or paper etc.
- To reduce the amount of ice building up in the
evaporator, cover all liquids and moist food.
- Let all hot foods cool well before putting them into the
refrigerator.

2.4 Defrosting

The evaporator is working on below freezing
temperatures and will form frost and ice from humidity
in the air. The humidity increases with higher outside
temperature, with storage of non sealed fresh food and
liquids and the time the door is kept open. Defrosting
shall be made when the frost layer is more than 1/8"
thick.
Set the thermostat in OFF position or switch off on the
ASU control panel. Store the foodstuff and the liquid as
cold as possible during the defrosting process.
Do not use sharp metal tools to remove frost or
ice. Do not re-start until the refrigerator is completely
defrosted, cleaned and dried. Empty and clean also
the plastic drip tray below the evaporator. Place towels
in the bottom of the refrigerator to collect melt water.
the compressor

3. Maintenance

The Isotherm refrigeration systems have a fully
hermetic closed cooling system and do not require any
maintenance or refi lling of refrigerant.
The compressor is of mobile type and has a very high
effi ciency and an outstanding life-time. The refrigerator
shall be left in the boat during the winter. (If the
temperature is below freezing point, the compressor
may not start). The maintenance is reduced to
periodically, not less than a year, cleaning of the
condenser from dust. Use a soft brush and no sharp
tools. Keep the cabinet inside
clean. Use lukewarm water
and a mild detergent for
cleaning the inside. Put the
doors, during not in
operation periods, in their
slightly open ventilation
position. Release the catch
on the door for this
purpose with a coin or a small
screwdriver (see fi g.) (not
valid for Stainless steel version,
"INOX"). Take out the bulb
from the interior light to avoid
power consumption or switch
off a main switch if there is
one installed connected to the
refrigerator power supply.

3.1 Battery voltage sensor

To protect the batteries from becoming completely
discharged, a battery voltage sensor switches off the
compressor automatically at the following levels:
System voltage V
12
24
If the bridge between C and P is cut off, values within
the () are valid.
For ASU refrigerators:
System voltage V
12
24
Cut out V Cut in V
9.6 (10.4) 10.9 (11.7)
21.3 (22.8) 22.7 (24.2)
Cut out V Cut in V
10.0 12.0
22.0 23.5
4