GB
985408004
13/20
Warning! Too little heat transfer at the heat exchanger
in the external circuit (condenser)..
The cooling unit may only be operated with cover, otherwise
heat dissipation at the condenser is not sufficient, and the
cooling unit may be damaged.
Immediately after the switch-on of the service voltage, the
unit goes into the start-up/test mode. After that the evapora-
tor fan continues to run. Compressor and condenser fans
run on as required (the temperature of the switching thresh-
old (T
set
) has been reached, or are switched off (temperature
lower than switching threshold (T
set
)).
• Free discharge of any condensate produced must be provided to
ensure trouble-free operation.
11 Cleaning and Maintenance
Hazard!
Isolate the cooling unit from the mains before carrying out
any cleaning or maintenance operations.
11.1 Cleaning
The cleaning intervals depend upon the relevant operating condi-
tions. In particular observe the following instructions.
• Clean the heat exchanger regularly.
• Clean the heat exchanger using a soft brush or pressurized air.
• We recommend that the condensate run-off opening be checked
regularly.
Proceed as follows:
1) Disconnect the cooling unit from the power supply.
2) Removing the unit hood:
Remove the screws (A).
Tilt the hood approx. 20°.
Remove the earthing cable and cable of the display unit on the
inside of the hood.
Then raise the hood approx. 15mm and pull it out of the slots in
the base plate (B).
3) Clean heat exchangers
CAUTION!
Protect the electric components against leakage.
CAUTION! Damage to louvres.
Do not use any pointed or sharp-edged objects. The ribs
should not be compressed or damaged during the cleaning
process.
CAUTION! Damage to electric connections on the
covering hood
If the covering hood is removed, the electric plug-in connec-
tions on the inside must be removed by hand. During fitting
do not forget to plug-in!!
• If the cooling units are provided with a front filter clean the filter
mat regularly. The cleaning intervals or the intervals for replace-
ment of the filter mat mainly depend upon ambient conditions (air
pollution).
• You can rinse the filter mat using water heated to 40 °C and
commercially available mild detergent. It is possible to remove
any dry dirt by knocking the mat slightly, vacuum cleaning it or
blowing it out.
CAUTION: Damage to the filter mat.
Do not wring the filter mat. Avoid too solid a water jet.
• If the filter mat is oily or greasy, replace.
11.2 Maintenance
The cooling circuit, as a maintenance-free, hermetically sealed
closed system, is filled at the factory with the necessary coolant,
checked for leakages and is subjected to a functional check run.
The cooling unit is largely maintenance-free. The components
around the external air circuit require maintenance and cleaning
depending upon the ambient conditions (see Section 11.1).
After each service, the full performance capacity of the condensate
run-off should be checked.
12 Stopping
If the cooling unit is not in use for a longer period, disconnect it.
Ensure that unauthorised persons cannot start the cooling unit.
When the cooling unit is no longer needed, it must be disposed of by
authorized specialist personnel in accordance with all applicable
environmental protection regulations. (see also Section 4, General
Information)
It is essential that the refrigerant in the cooling system is properly
removed by suction. Refrigerant emissions must be prevented.
ca. 15mm
A
A
B
20°
