7 Inspection and maintenance
RITTAL outdoor cooling unit assembly and operating instructions 39
6.1.9 Resetting the Comfort controller
After the occurrence of faults A03, A06 and A07,
you will need to reset the Comfort controller.
• Press buttons 1 (
▲) and 3 (▼) (Fig. 9) simultane-
ously for 5 sec.
The system messages will disappear and the tem-
perature display will be shown.
7 Inspection and maintenance
7.1 General
The cooling circuit is designed in the form of a main-
tenance-free, hermetically sealed system. The cool-
ing unit is filled with the required quantity of refriger-
ant at the factory, checked for leaks, and subjected
to a functional test run.
The installed maintenance-free fans are mounted on
ball bearings, protected against moisture and dust,
and fitted with a temperature monitor. The life ex-
pectancy is at least 30,000 operating hours. The
cooling unit is thus largely maintenance-free.
All that may be required from time to time is to clean
the components of the external air circuit using com-
pressed air or a vacuum cleaner. Any stubborn, oily
stains may be removed using a non-flammable de-
tergent, such as degreaser.
Maintenance interval: 2000 operating hours. De-
pending on the level of contamination in the ambient
air, the maintenance interval may be reduced to suit
the air pollution intensity.
Sequence of maintenance measures:
– Check the level of dirt.
– Cooling membranes soiled? Clean if necessary.
– Activate test mode; cooling function OK?
– Check noise generation of compressor and fans.
8 Storage and disposal
During storage, the cooling unit must stand upright.
The closed cooling circuit contains refrigerant and oil
which must be properly disposed of for the sake of
the environment. Disposal can be performed at the
RITTAL plant.
Please contact us for advice.
Risk of electric shock!
The unit is live.
Switch off the power supply before
opening, and take suitable precautions
against it being accidentally switched
back on.
Cleaning, maintenance and repair work on
the unit may only be performed by autho-
rised specialist personnel.
Caution!
Risk of fire!
Never use flammable liquids
for cleaning.
Caution! Risk of damage!
The cooling unit must not be subjected
to temperatures below –40°C or above
+70°C during storage.
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