10
A U T O M A T I O N & C O N T R O L
Differential Filtration Controller
Monitoring the controller’s operation
The G75-DFC has two operation modes: Auto and Off.
The Auto mode
The Auto mode is the running mode of the controller, while in this mode the upper digits (UD) of the screen display the
current accumulation of the Flush Cycles Counter, and the lower digits (LD) display the Differential Pressure (DIF) and its
Settings Value.
When the controller backwashes the filters the Faucet Icon appears on the display’s upper line and the number of the
currently backwashed filter blinks.
When low battery state is detected the Battery Icon on the upper line of the screen starts blinking.
The controller starts a backwash cycle (FC), when the current DIF reading is greater than the SET value for (n) number of
consecutive DIF readings. The backwash cycle ends one minute after the last filter cleaning ends.
The display turns OFF (blank) if no button is pressed for one minute. Pressing any button turns the display ON.
The OFF mode
This mode is used when the operation of the controller is paused, such as off season or when controlling the filters is not
required. In the OFF mode the lower line of the controller (LD) displays
OFF
. In this mode the controller stops reading the
DIF switch, and the display turns OFF (blank) if no button is pressed for one minute.
Switching operation modes
When the display is turned ON pressing the
MODE
button shortly (about 0.5 of a second) switches the controller from
Auto
to
OFF
mode and vice versa.
The backwash cycles counter
When the controller is in Auto mode, pressing the
MODE
button together with the (Plus) key displays the current
value of the counter on the display’s upper line (UD).
Resetting the counter to zero is done by pressing together the (Minus) key. The upper line displays c000 and the
controller returns to Auto mode.
Starting a backwash cycle manually
When the controller is in Auto mode, pressing the
SET
button together with the (Plus) key starts a backwash cycle,
the screen displays the Hand and the Faucet icons and the currently backwashing filter number blinks. The controller
returns to Auto mode once the backwash cycle ends.
To manually stop a backwash cycle press the SET button together with the (Minus) key. The cycle stops and the
controller returns to Auto mode.
The User Interface
