General Information - Webasto Compact Cooler 4E Operating Instructions Manual

Compact Cooler 4E / 5 / 5 Lite / 8
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General information

Only start the air-conditioning system when
the vehicle engine is running as the vehicle
battery will be discharged if the engine is at
rest.
If the electrical connection of the air-
conditioning system is such that the fans
can be activated when the engine is
switched off, they will not cool the cab.
Operating the system with the engine
switched off results in the air in the interior
of the vehicle being circulated.
Attention, battery discharging!
The air-conditioning system is only operable
when it is filled with the quantity of
refrigerant and refrigerating machine oil
specified in the installation instructions.
Without temperature controller, the
temperature of the air-conditioning system
is controlled by the anti-ice thermostat
installed in the system. This thermostat
switches the compressor off once the
evaporator reaches a temperature when ice
is likely to form. The evaporator (radial) and
condenser fans (axial) continue to run. On
the Compact Cooler 5 Lite, only the
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evaporator fan continues to run. When the
temperature rises above the trigger point of
the anti-ice thermostat, the compressor
cuts in again.
If the temperature controller is installed
(optional), any desired cabin temperature
can be set between 10 and 30 °C. The
compressor is switched off when the set
temperature is reached. The evaporator
(radial) and condenser fans (axial) continue
to run. On the Compact Cooler 5 Lite, only
the evaporator fan continues to run. The
passenger compartment temperature
increases again and switches on the
compressor again when the switching
temperature is reached.
To quickly cool and dehumidify the interior
of the vehicle after it has been parked for a
lengthy period of time in a high ambient
temperature and sunny conditions, we
recommend that you initially operate the
fan at speed 3 in the recirculating air mode.
After the interior temperature has reached
a pleasant level the fan can be turned down
to speed 2 or 1 depending on the ambient
temperature.
If the vehicle is greatly heated up by
exposure to direct sunlight, it is
recommended that the doors and windows
be opened for ventilation before switching
on the air-conditioning system.
The Compact Cooler 4E electric air-
conditioning system can be operated either
when the engine is running or when the
ignition is switched on. For operation with
the ignition switched on, the system is
equipped with a battery-discharge
protection circuit. If the electrical system
voltage falls below 20 V for longer than
10 seconds or if the electric motor suffers
an overload (> 80 A/sec), the system will cut
out automatically. It can be restarted by
being switched on again.
Your service centre will be happy to answer
questions regarding installation.