Function And Operation - salmson SC-Fire Diesel Manuel D'installation Et Mise En Service

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6.2 Function and operation

DANGER! Risk of fatal injury!
When working on the open switchbox, there is a
danger of electric shock from touching the live
components.
This work must only be carried out by qualified
personnel!
NOTE:
After connecting the switchgear to the supply
voltage, as well as after every power interruption,
the switchgear returns to the operating mode set
before the power interruption.
6.2.1 Switchgear operating modes (Fig. 2)
Switching the switchgear on/off
After the batteries have been connected to the
switchgear and the power supply has been con-
nected, the control is ready for operation after a
few seconds (the start phase). The green standby
LED (Fig. 2, item 1) lights up. The LC display alter-
nately displays the battery voltage of the con-
nected batteries and the charging current. The
chargers and the heating system to ensure a con-
stant engine oil temperature can be switched on
and off using the main switch. To switch the con-
trol off, disconnect the batteries.
Pump request
If the pressure drops below the set target pressure
at one or both of the pressure switches, this is
indicated by a white LED (Fig. 2, item 7). If the LED
flashes, this indicates that the set delay time has
expired (see menu 1.2.5.1). After the set delay
time has expired, the LED lights up continuously
for as long as the pressure switch remains tripped.
The automatic start cycle for the diesel engine
takes place, with a maximum of 6 start attempts.
The starting time (menu 1.2.2.1) and the pause
time (menu 1.2.2.2) can be set using the software.
After each start attempt, the system switches to
a different battery. A non-engaged pinion in the
motor's gear rim is detected. Additional attempts
are carried out to engage the pinion.
Once the diesel engine has started, the green LED
(Fig. 2, item 2) indicates this. The LED lights up if
the measured speed exceeds the set switching
threshold for "motor in operation" (menu 1.2.1.3).
The LC display shows the current speed when the
motor is running. The engaged starting pinion is
automatically disengaged. The diesel engine can
only be stopped manually be pressing the "stop"
button (Fig. 2, item 14). The green LED (Fig. 2, item
2) goes out when the speed drops below the
switching threshold for "motor in operation" and
the LC display shows the battery voltage and
charging current again.
38
Priming device
If the level of the pump priming tank falls below
2/3, the float switch closes and this is indicated by
a white LED (Fig. 2, item 8). If the LED flashes, this
indicates that the set delay time has expired
(see menu 1.2.5.2). After the set delay time has
expired, the LED lights up continuously for as long
as the float switch remains tripped. The automatic
start cycle for the diesel engine takes place, with a
maximum of 6 start attempts. The starting time
(menu 1.2.2.1) and the pause time (menu 1.2.2.2)
can be set using the software. After each start
attempt, the system switches to a different bat-
tery. A non-engaged pinion in the motor's gear
rim is detected. Additional attempts are carried
out to engage the pinion.
Once the diesel engine has started, the green LED
(Fig. 2, item 2) indicates this. The LED lights up if
the measured speed exceeds the set switching
threshold for "motor in operation" (menu 1.2.1.3).
The LC display shows the current speed when the
motor is running. The engaged starting pinion is
automatically disengaged. The diesel engine can
be stopped manually by pressing the "stop" but-
ton (Fig. 2, item 14) or automatically when the
"auto" function is activated in menu 5.2.2.0. The
green LED (Fig. 2, item 2) goes out when the speed
drops below the switching threshold for "motor in
operation" and the LC display shows the battery
voltage and charging current again.
Voltage monitoring of batteries
To improve operational reliability, the batteries
and the mains power supply to the chargers are
monitored continuously. The chargers report any
faults to control, such as a wire break, short-cir-
cuit, battery fault or mains supply fault. The con-
trol evaluates the faults and displays them in the
fault menu.
In addition, a minimum battery voltage can be set
in menu 5.4.1.0. If the voltage in one of the con-
nected batteries falls below this value, an error
message appears on the display.
Monitoring the motor start
After the pressure or float switch trips, the motor's
automatic start cycle takes place. The motor start
is monitored for malfunctions by the control, such
as the pinion engaging in the motor's gear rim and
false motor starts. If no confirmation that the pin-
ion is engaged is received during starter activa-
tion, the system performs an additional activation
to attempt to throw the pinion into gear. An error
message is shown on the display. After each start
attempt, the system switches to a different bat-
tery. After 6 unsuccessful start attempts, the sys-
tem interrupts the process, the yellow LED (Fig. 2,
item 13) lights up, an error message is shown on
the display and the allocated fault signal contacts
are active.
Wilo Salmson France SAS 09/2014