Roof-top air-conditioning system CC8 5 Operating information
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5.5 Operating instructions
NOTE
Observe operator’s instructions.
Before starting operation, ensure that:
• the air-conditioning system is in perfect working order;
• scheduled maintenance / checks have been performed;
• air inlets and outlets are unobstructed (no leaves, etc.);
• condensation water drain holes are unobstructed.
Operation with engine running:
• The system is controlled by means of the rocker switches ON / OFF and the fan switch.
• With the engine running, the cabin interior cools in circulating-air mode according to the fan power stage 1, 2 or
3 selected.
• Without electronic room thermostat (temperature controller), the temperature of the air-conditioning system is
controlled by the anti-icing thermostat integrated in the system. It switches off the compressor when the evaporator
icing temperature is reached while the evaporator and condenser fans continue to run. The compressor is re-
activated when the switching temperature of the anti-icing thermostat is exceeded.
• The cooling performance can be controlled manually via the fan power stage.
Stage 1: low cooling performance at low air outlet temperature and low fan power
Stage 2: medium cooling performance at medium air outlet temperature and medium fan power
Stage 3: high cooling performance at somewhat higher air outlet temperature and maximum fan power
NOTE
For quick cooling and dehumidification of the cabin interior with high outside tempera-
tures and the sun shining, it is recommended to operate the fan at power stage 3 first.
When a comfortable cabin temperature has been reached, the fan can be turned down
to stage 2 or 1 depending on the outside temperature.
If the vehicle has heated up extremely by exposure to sunlight, the doors and windows
should be opened first to ventilate the vehicle before switching the air-conditioning on.
5.6 Operation of air-conditioning system (with room thermostat function and fresh air
ventilation flap)
Operation is as described in 5.5 for the basic version.
The required temperature can additionally be controlled by means of a rotary temperature controller. The compressor
is switched off when the preset temperature is reached. It is reactivated by a rise in temperature of about 2K.
If the system has a fresh air ventilation flap, the flap can be opened and closed by means of the 2-position rocker switch.
In the open position, the system operates in fresh-air mode and the indicator in the switch lights up.
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