EcoWater CHC Series, Service And Troubleshooting Manual

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2. If the valves are responsive, verify that purged water is passing to the drain during a back
wash cycle. If no water is passing to the drain, then look for clogged piping associated with
the drain.
3. If water is present at the drain during a back wash, then clean the filter element. A stainless
steel brush can be used with Rydlyme to clean the Filtomat and ZGF filters. EcoWater
CHC also recommends polishing the outside surface of a ZGF element. Once cleaned
verify that the filter again back washes effectively. Normally when the elements are
plugged you will need to discuss your findings with CHC Service Personnel to see if any
changes to the system are required. If the filter element becomes plugged frequently
changes to the DP switch set point, filter back pressure or other items may need to be
adjusted to diminish failure occurrences.
4. Verify the DP switch as its pressure increases to see at what pressure the filter responds with
a back flush routine. If an automated back flush is not started, the DP switch may be
defective and you will need to verify the switches signal to the controller, if the signal is
available at the controller, replace the controller, if the signal is not present at the controller,
replace the DP switch and or repair/replace the wiring from the switch to the controller.
5. Make sure the required back pressure is set with the valve down stream of the filter. The
ZGF requires 45 psi outlet pressure under normal conditions, the Turbo disc requires
minimally 32 psi outlet pressure and the Filtomat requires minimally 35 psi.
ZGF Filters- Refer to the appropriate service manual but here are a few thing to look for.
d. Air is required on the majority of the ZGF units. It requires minimally 80 psi to
operate the system. Make sure that air is available for the unit and that as the failure
occurred that air was present (if the failure occurred while you where not on site)
e. Holding down the Reset button can be used to reset a displayed alarm.
f.
The air operated actuators must move freely, if they are sluggish make sure that a
moisture separator is on the air line at the filter to remove any water from the air
supply.
g. Phoenix- If the Home Position Not Found message appears, then verify all electrical
connections from the controller to the filter itself, we have found many of the filter’s
yellow interface cable to the black filter cable connections to be defective. We
normally rewire the yellow and black cables directly into the DP switch where we
solder the connections directly to their corresponding mates. You will be required to
set the foot valve back to home position before you can continue using or testing the
filter.
h. Phoenix DP Switch- The DP and High DP switches are normally closed, so that
when testing them you should have a 12V DC signal passing through the switches
with the filter pressures normal. Use the electrical schematic to verify which wires
to measure or call CHC Service Personnel.