Operating Faults; End Of Season Maintenance - Mark TA209 Livret Technique

6.2.7 Operating faults

If during normal operations of your cooling unit, the "EA" code appears on the control panel, it is
most likely that dirtiness has accumulated (e.g.: leafs, etc.) around the discharge valve and it doesn't
allow the complete evacuation of the water or it could be the level switch that doesn't work
properly. The error signal can be reset by turning off the machine. If, when turning back on the
machine, the signal appears again after about 1 minute, a technical problem does persist so it's better
to contact the installer or Mark Climate Technology.
If during normal operations of your cooling unit, water drips continuously through overflow holes,
it is most likely that the level switch is not working properly. Contact the installer or after sales
service.
In both cases it would be best to shutdown the plant, cut-off electrical power, close the water tap,
get in touch with the installer who constructed the plant or a licensed technical service center.
6.2.8 Bus System
Comfort line models have on-board printed circuit that allows to have a BUS System connection
called CBS or a one command control system called CABS. The CBS system can be controlled by
a P.C. and can manage up to 58 units. The CABS System can manage groups of 5 unit controlled
by one remote command. It is possible to have these systems implemented even after the cooling
system is installed. For further information, please contact Mark Climate Technology.
7.0 Maintenance
We recommend annual service to the system to maintain it in perfect operation conditions. Before
the machine start-up the equipment should be checked to make sure it will work properly, so any
maintenance or repairs necessary could be carried out before the working season of the unit.

7.1 End of season maintenance

• Cut power inlet off by using the main isolator-switch.
• Close the water supply. Empty the water supply plant to avoid bursts due to icing.
• Take the machine top off.
• Check that waterways are clean and that there are no obstructions in the water supply and
distributor in the upper part of the unit. Clean any debris in the water pump.
• Fully clean the tank of the unit. Use a mild detergent, not a solvent cause it may react with plastic
materials.
• Replace and fix the machine top using the bolts supplied.
• Apply the protection cover on the machine making sure that it has no holes or damages, if
damage is detected, repair the cover or substitute it.
It is very important that the protection cover is applied to the evaporative cooler at the end of the
!
season, this avoids the machine from being damaged by climatic factors during the set-aside period;
smog, acid rain, ice, etc.
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