EcoWater CHC Series Service And Troubleshooting Manual page 55

d. The filter elements ride inside the element cassette. As a back wash is conducted
this cassette releases pressure on the disks, improving the back wash capability.
Make sure this cassette opens and squeezes against the disks easily, if not, clean and
replace the o-rings on the cassette.
e. The filter elements can be cleaned with Rydlyme or by hand, each side of each disk
has small groves that will need to be clean. Each disk should be free to move, if
disks are stuck together, clean or replace them.
Filtomat/Amiad/Forsta Filters- Refer to the appropriate service manual but here are a few thing
to look for.
a. The back pressure on the filter is required as specified above.
b. Under normal operation (no back wash in progress) the rinse piston will be
pressurized and if you remove its hose from the end of the filter water will
aggressively pass through the hose, in most cases it will travel several feet away
from the hose. If it does not, then there is an obstruction in the solenoid valve that
will either need to be removed with cleaning or replace the solenoid.
c. The DP switch used with the Filtomat and Orival systems have two switches in
them, on older Filtomat systems only one switch is used, so upon a failure of the DP
switch you can utilize the spare switch to repair the system. On newer Filtomat and
Orival systems you will notice that both switches are utilized. In this case you must
replace the DP switch if it fails. To adjust the set points of the DP Switch, utilize the
supplied allen wrench to loosen the screw on the switch slider, move the switch
towards the HI side to decrease the DP setting and towards the LO side to increase
its setting pressure. See attachment "New Style DP Switch".
d. No back pressure on the drain is allowed. If the customer has installed a blow down
meter on the drain, contact EcoWater CHC Service to discuss further requirements.
e. If you have an older style Filtomat controller it will have a TECO controller. The
Teco controller will indicate that a BACK WASH FAILURE has occurred, you will
need to verify the appropriate steps if this message appears. You could also find a
SCREEN CLEANING REQUIRED message. This message indicates that greater
than 5000 back washes have occurred. To reset this message, Press the ESC button,
select STOP and press the OK button, then select RUN and press the OK button.
Now when you press the ESC button the display should revert back to the initial
screen and the BW counts should indicate 00000. Of you find any other error codes,
you will be required to replace the controller.
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