Grundfos Hydro 50-250/263 YJS ASD-U3-B Installation And Operating Instructions Manual page 26

Firefighting systems
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9.1.3.1 Functions of buttons on the LCD display
The following buttons can be found on the LCD multifunction
display of the control panel:
Buttons
Description
P
Used for accessing and exiting
the programming mode
UP and DOWN
In programming mode, they can be used for
changing parameter values.
Outside the programming mode, they can be
used for adjusting the contrast of the LCD display.
ENTER
Enables access to the selected parameter and
confirmation of its value
With the motor running, this button displays the
fuel level.
TEST LED
Used for testing the LEDs on the control panel
When pressed, all the LEDs are lit.
R
Used for resetting alarms and the operating hour
counter
P1 and P2
Used for testing the pressure switches and the
emergency starting circuit
26
9.1.3.2 Manual operating mode of diesel pump
1. Set the key selector to TEST.
2. Start the engine by pressing the engine START button.
3. Perform the necessary tests.
4. Stop the engine by pressing the engine STOP button.
After pressing the engine STOP button, the display shows the
message "STOP".
5. Keep pushing the engine STOP button until the message
"Engine OFF" appears on the display.
After the engine stops, by setting the key selector
to "AUT", once the pressure value in the network is
under the start threshold of the pressure switch, the
pump will start again immediately.
When the display shows "Engine OFF", after
about eight seconds it is possible to reposition the selector to
AUT.
Related information
9.2 Operating modes
9.1.3.3 Automatic operating mode of diesel pump
1. Set the key selector to AUT.
• If the pressure of the firefighting network decreases, one
of the dedicated pressure switches provides the input for
starting the pump.
• The pump can be stopped by positioning the key selector to
TEST and pressing the engine STOP button. After pressing
the engine STOP button, the display shows the
message "STOP".
2. Keep pushing the engine STOP button until the message
"Engine OFF" appears on the display.
After the engine stops, by setting the key selector
to "AUT", once the pressure value in the network is
under the start threshold of the pressure switch, the
pump will start again immediately.
• When the display shows "Engine OFF", it is possible to
reposition the selector to "AUT" after eight seconds.
• In applications with hose reel systems, the stopping of the
diesel pump can be controlled by an internal timer.
This function must be activated by the user if needed and
allowed by local legislations. See the dedicated section for
the automatic stop function of the diesel pump.
Related information
9.1.3.8 Automatic stop function for diesel pump
9.2 Operating modes
9.1.3.4 Emergency operating mode of diesel pump
In the case of an emergency and when the engine has not started,
it is always possible to start the engine directly with the
batteries regardless of the control panel settings or the pressure
switch command.
There are two EMERGENCY START buttons (one per battery) for
enabling this function, and they are protected by a breakable glass.
Related information
9.2 Operating modes

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