7 Inspection and maintenance
Rittal cooling unit assembly and operating instructions
23
EN
6.1.10 Resetting the e-Comfort controller
After the occurrence of faults A03, A06 and A07,
you will need to reset the e-Comfort controller.
• Press buttons 1 (
▲
)
and 3 (
▼
) (Fig. 18)
simultaneously for 5 sec.
The system messages will disappear and the
temperature display will be shown.
7
Inspection and maintenance
7.1 General
The cooling circuit is designed in the form of a
maintenance-free, hermetically sealed system.
The cooling unit is filled with the required quantity
of refrigerant 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 a vacu-
um cleaner or compressed air if they become visibly
dirty. Any stubborn, oily stains may be removed
using a non-flammable detergent, 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.
– Filter soiling? Replace the filter if necessary.
– Cooling membranes soiled? Clean if necessary.
– Activate test mode; cooling function OK?
– Check noise generation of compressor and fans.
7.1.1 Compressed air cleaning
Fig. 22:
Disconnect the mains plug
Fig. 23:
Release the louvred grille
Fig. 24:
Remove the louvred grille
Risk of electric shock!
The unit is live.
Switch off the power supply before open-
ing, and take suitable precautions against
it being accidentally switched back on.
Caution!
Risk of fire!
Never use flammabel liquids
for cleaning.
Summary of Contents for SK 3273.xxx
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