Webasto Compact Cooler 4E Operating Instructions Manual page 5

11. Even if the air-conditioning unit is not in
use, individual components may be subject
to wear due to the normal ageing process
or the stresses or strains generated by
driving the vehicle. The appropriate checks
listed in the maintenance and service chart
in the installation instructions must
therefore be carried out regardless of the
system operating time.
12. The receiver-drier must be replaced at
least every twelve months. When working
on the refrigerant system, the receiver-drier
must always be replaced (not necessary for
Compact Cooler 5 Lite).
13. During extended shut-down periods,
the air-conditioning system must be
operated at least once a month for a period
of approx. 15 minutes to prevent the shaft
seals on the refrigerant compressor from
becoming drying out or any moving parts
from seizing due to oil resinification.
Requirement: Minimum outside
temperature > 5 °C e.g within a heated
factory building.
14. Always ensure that the amount of oil in
the air-conditioning unit complies with the
details in the installation instructions.
15. The plate fins of the condenser,
evaporator or heat exchanger should be
cleaned with compressed air directed
against the normal direction of air flow if
contamination is slight. If the soiling is
severe or the unit has greasy deposits, first
clean it using soap suds or a suitable
cleaning solution (must be compatible with
copper or aluminium) and then use
compressed air or a water jet.
Caution: Beware of damage due to an
excessively strong jet of air or water.
16. When the vehicle is cleaned with a
direct jet of water or in a car wash, the fresh
air ventilation flap must be closed. Note the
overall height of the vehicle including roof-
top air-conditioning system
17. Failure to observe the installation
instructions and the information it contains
will lead to Webasto being released from
any and all liability. The same applies to
repairs performed improperly or using parts
other than genuine spare parts.
18. The fresh air ventilation flap (option for
Compact Cooler 8) should remain closed in
winter.
Compact Cooler 4E / 5 / 5 Lite / 8
19. When filling the heating circuit with
coolant (water / glycol), care must be taken
to bleed the circuit via the bleed valve of the
system. Further replenishment of the
heating circuit is only permitted with the
engine running.
20. Only operate the air-conditioning
system when the housing and lines are not
damaged.
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