EcoWater CHC Installation & Service Manual Download Page 25

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Control Panel Message of “Conductivity HI”-

This indication is shown when the conductivity value is

exceeding the upper alarm limits as set in the Set Up screens. This is normally an indication that
the blow down or its piping is plugged or non-functional. It can also be an indication that the
makeup water source has lost is supply pressure and make up is not being added to the system fast
enough to keep up with the blow down rate. If the water supply system has failed, take
appropriate actions with regard to the supply, and you may need to turn the Filter skid’s power
OFF while the tower’s water level increases.

Control Panel Message of “Conductivity LO”-

This indication is shown when the conductivity value is

below the lower alarm limits as set in the Set Up screens. This is normally an indication that a
problem with the blow down or filter back wash system has occurred. Please verify the operation
of the blow down valves and filter back wash functions. This message could also be shown if low
load conditions with the water system are occurring (as in winter) if the load to the system is too
low, the conductivity of the water system may not cycle up to the appropriate COC levels. This
message may continue until the load increases on the water system. Monitor the system routinely
to verify that this condition is associated with the load.

Control Panel Message of “BW Solenoid Fail”-

This indication is shown when the main Back Wash

Solenoid has failed to open and back wash the filter. The PLC monitors the pressure and
determines if a failure has occurred and will automatically initiate the use of the backup BW
Solenoid . By replacing the failed component and inserting a passcode of 0000 into the password
screen the alarm will be removed and the use of the main solenoid will be resumed. See Back
Wash Failure for more information.

Control Panel Message of “Blow Down Fail”-

This indication is shown when the PLC has determined

that the blow down actuator has failed to open or close upon command. The front most actuated
valve (closest to the Control Panel) is the primary valve. If this failure occurs the PLC will
automatically use the secondary actuator as needed. If the Primary valve has failed in the Open
position, then close the flow restriction valve downstream of the actuated valve until the repair has
been made. Once the valve has been fixed and its function is verified by the PLC, the message
will disappear and the use of the primary valve will continue.

Algae growing in tower in sunlit areas-

This is not a failure. The CHC system can only retard water-

borne algaes, The use of a chemical algaecide to treat the algae is recommended. You can also
recommend covering the affected areas with a sun screen to reduce the algae growth rate.

Scale on Fill-

The CHC system is designed to make the scale forming molecules start to crystallize

before they reach the condenser or other heated surfaces. This keeps the harder layered scale from
forming. It is normal to see a cotton like build up on the fill of a tower when treated by the CHC system,
however, it is formed in a manner that allows it to be easily removed with a light touch. Normal cleaning
of the CHC treated towers is still required as specified by your tower manufacturer. However, when the
CHC system includes an appropriately constructed filtration and sweeper nozzle system, the amount of
debris removed during cleaning should be greatly diminished as compared to a chemically treated tower.