18
Monitoring the System Status & Initiating a Backflush
The Status Screen displays the current mode of the controller. It also al-
lows the operator to manually start or stop a backflush cycle. There are
three ways that a backflush cycle can be initiated:
1. Manually, following the instructions below.
2. Automatically, by elapsed time (per the backflush frequency setting).
3. Automatically, by pressure differential (as set by the PD switch-gauge).
To initiate a manual backflush, press the
OK
button while on the status
screen. At any time during the backflush cycle, press the
ESC
button to
stop the cycle.
The controller will automatically display the status screen if a backflush
cycle is initiated or if the pressure differential set-point is reached.
The current
Status
of the controller is displayed as follows:
1.
AUTO
- Indicates that the controller is waiting for a backflush cycle to
begin. The system is in normal filtration mode and flowing water. The
backflush frequency timer is running.
2.
AUTO - High PSID
- Indicates that a high pressure differential from
the PD Gauge has been sensed and that the controller is about to start a
backflush cycle.
3.
ON -
Indicates that the system is in backflush mode.
Valves to Backflush
is displayed at the beginning of a backflush cycle
as the valves are redirecting water from normal flow to backflush flow.
The controller will automatically turn the pump off while it is changing
the valve positions.
Backflushing
System
is displayed when the pump is cycling water
through the system in backflush mode.
Valves to Filtration
is displayed at the end of a backflush cycle as the
valves are returning to normal flow positions. The controller will auto-
matically turn the pump off while it is changing the valve positions.
Note - The
Status: ON Valves to Filtration
screen is also displayed in
the Initial Power Up Sequence. To insure proper filtration in the event
of a power failure, the valves are assumed to be in a non filtration posi-
tion, the pump is turned off, and the valves moved to the filtration posi-
tion. Then the pump is turned on and normal filtration is resumed.
4.
ON - System Alarm
- On any of the Status screens a System Alarm
screen can be activated. The second line down will alternately flash
>> System Alarm <<
and whatever was on line 2 before the alarm oc-
curred. The standard system alarm is the Consecutive Backflush Alarm.
This alarm occurs when the backflush cycle has been initiated three
times in a row by the Pressure Differential Switch (PSID). The Opera-
tor should verify proper operation of the PSID. The System Alarm can
be reset by pushing the red ESC button while a status screen is dis-
played.
