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3
Operating modes
When operating, the controller will be in any one of the following
modes: Service, Stop, Forward Flush 1, Forward Flush 2, Standby,
Fault. Immediately after starting, the controller will display firmware
version and then proceed to Service if tank permeate level is low and
backpressure switch is not activated.
Configuring and manipulating the controller is done using
START and STOP buttons. Current mode of operation and
pertaining information is shown on the LED display. Opening the
circuit in the Stop domain of terminal block (see figure 1) will bring
the controller to Stop mode regardless of its current mode of
operation. Closing the circuit will take the controller back to the
mode that had been interrupted. Stop terminals can be used to
connect a microswitch on pre-treatment media filter, a relay or other
means of external control to the controller.
Following is the description of controller modes.
SERVICE
In Service mode, the RO machine produces permeate. If no fault
conditions are taking place, float switch is low and backpressure
switch is not activated, the controller will operate in Service mode.
Status of outputs in Service
High pressure and
antiscalant pumps
Entry valve
Forward flush valve
Bypass valve
Alarm
Display will flash cumulative runtime of the RO machine,
remaining time before scheduled maintenance alert (if set in
configuration step 3.1), temperature and conductivity of permeate
O
L
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E
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on
open
closed
open (if configuration step 1.3 is set to 0)
closed (if config. step 1.3 is non-zero value)
off
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