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Installation and operating instructions: Wilo-SC-Fire Diesel A2P
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Pump demand
If the set pressure configured is not reached for at least one of the two pressure on/off switches, the green or
yellow LED signals this (Fig. 2, pos. 34, 35). If these LEDs flash, this signifies that a configured dwell time has
elapsed (see menu 1.2.5.1). Once the set dwell time has elapsed, the corresponding LED remains turned on
while the pressure switch is activated. The automatic start-up test run of the diesel motor is launched with a
maximum of 6 start-up attempts. The running-in period (menu 1.2.2.1) as well as the pause time (menu 1.2.2.2)
can be set using the software. After each start-up attempt, a switch to the other battery takes place. Any non-
coupled pinions in the ring gear of the motor are detected. Connection is achieved by means of additional
attempts.
Successful start-up of the diesel motor is signalled by the green LED (Fig. 2, pos. 3). This lights up when the
measured rotation speed exceeds the threshold of the cut-in adjusted for “motor in operation” (menu 1.2.1.3).
The LCD displays the symbol of the pump and the battery currently being charged with the remaining time
before passing to the next charging system. The pinion for engaged starter is automatically disengaged. The
diesel motor can only be manually switched off with the “OFF” button (Fig. 2, pos. 21), if at least one of the key
switches is in the “Stop” position and if the change-over switch is not engaged. The green LED (Fig. 2, pos. 3)
turns off if the cut-in threshold for “motor in operation” is not reached. The LCD displays once more the
remaining time until passing to the other charging system.
Filling device
If the start-up tank level falls below 2/3 of its full level, then the “START-UP TANK MALFUNCTION” LED
(Fig. 2, pos. 12) is activated.
If the LED flashes, this signifies that a follow-up time is elapsing (see menu 1.2.5.2). Once the set follow-up time
has elapsed, the LED remains turned on while the float switch is activated.
This detection of a lack of water in the start-up tank launches the automatic start-up sequence of the diesel
motor, with a maximum of 6 start-up attempts. The running-in period (menu 1.2.2.1) as well as the time between
2 attempts (menu 1.2.2.2) can be adjusted. After each start-up attempt, a switch to the other battery takes
place. Any non-coupled pinions in the ring gear of the motor are detected.
A successful start-up of the diesel motor is signalled by a green LED (Fig. 2, pos. 3). This lights up when the
measured rotation speed exceeds the threshold of the cut-in adjusted for “motor in operation” (menu 1.2.1.3).
The LCD displays the symbol of the pump and the battery being charged with the remaining time before
passing to the next charging system. The diesel motor can be manually switched off with the “OFF” button
(Fig. 2, pos. 21), if at least one of the key switches is in the “Off” position and if the float switch is not engaged.
The green LED (Fig. 2, pos. 3) turns off if the cut-in threshold for “motor in operation” is not reached. The LCD
displays the remaining time before passing to the next charging system.
Monitoring of battery voltage
The cabinet is fitted with two battery chargers which are fed by the 230 V AC network.
The chargers deliver 12 V DC or 24 V DC, depending on the type of starter to be fed.
To maintain continuous service, the network voltage as well as the battery charges are constantly monitored.
Battery monitoring is ensured by the controller which constantly receives information from the two chargers.
The chargers can signal the following malfunctions to the controller:
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a rupture of the wire, coupling or connection,
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a short-circuit,
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a battery malfunction,
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a connection voltage error.
The malfunctions are analysed by the controller and displayed in the malfunction menu (Fig. 1, pos. 2).
Furthermore, it is possible to adjust the minimal battery voltage in the menu 5.4.1.0. If this voltage is not
achieved by one of the connected batteries, an error message is displayed on the screen.
