Roof-Mounted Air Conditioner KK2000 E
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Steps in the event of malfunctions in the electrical system
Systematically check individual circuits using the circuit diagram (see figure 3.1)
and localize any errors. Place special emphasis on the function of plug
connections, switches, relays, etc.
Generally check the following malfunction causes or rule out a malfunction for the
following reasons:
– Defective fuses
– Corrosion at the plug contacts
– Loose contact on the plugs
– Crimping problem on the plugs
– Corrosion on the lines and fuses
– Corrosion at the battery plugs
Steps in the event of malfunctions in the air conditioning system
– Defective vaporizer or condenser blower
– Soiled or clogged air filter, condenser or vaporizer blades.
– Loss of coolant or too little coolant in the system
If the system continues to switch off, have it checked by an authorized repair
center.
Note
To prevent icing in the vaporizer blades, avoid a combination of a lower blower level (1)
and lowest thermostatic setting (max. right) at especially high humilities.
If ice does build up, resulting in a noticeable reduction in air flow, then switch the
blower to maximum (3) and the thermostat switch to the max. left setting for 2 to
3 minutes.
Steps in the event of Malfunctions in the Coolant System
– If there are malfunctions in the coolant cycle, the system must be checked and
properly repaired by an authorized repair center. The coolant may never be released
into the air.
(§ 8, CFC chlorofluorocarbon prohibition from May 06, 1991)
6.6 Checks Before Initialization
To prevent unnecessary disassembly or redundant work, check the condition of the air
conditioner before starting maintenance work.
Visual check
a) External condition of the roof unit:
– No tears on the cover
– Air inlets and outlets clean and not damaged
– Mounting points are tight, no corrosion
– Hose and cable connections in perfect condition
– Metal holes in perfect condition.
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