Wilo -Control SC-Fire Electric A2P Installation And Operating Instructions Manual page 10

6.1.2 Structure of the switchgear (Fig. 1)
The installation of components in the switchbox depends on the performance of the pump connected.
The switchgear includes the following main components:
• Main on/off switch: Power supply of the switchgear (pos. 7)
• Human-machine interface (HMI): signal lamps or screen for displaying the state of operation (for example
availability, malfunction and rated current of the pump), user test of the pump and function allowing error
messages to be acknowledged (pos. 1, 2, 3)
• Key switch: selection of operating mode (manual, deactivation, automatic) of the pressure switches
(pos. 4, 5)
• Change-over switch (pos. 14): access to level 2
• Buzzer signal: additional buzzer for certain error messages (pos. 6)
• "SC controller" PCB: printed circuit board with microcontroller (pos. 9)
Warning: There are 2 "SC controller" PCBs, fixed with spacer sleeves to superimpose them.
• "SC U/I" PCB: Measurement/acquisition voltage/current (pos. 10)
• Current converter: pump current measurement (pos. 11)
• Fuse protection: protection of the pump motor (pos. 12)
• Contactor: Contactor of the motor of the pump (pos. 13)
• "SC Display" PCB: printed circuit board with display and rotary button (pos. 14)
• "SC I/O" PCB: printed circuit board with control/operating console (pos. 15)
• Key box: enables the storage of the keys from the key switches (pos. 8)
6.2 Function and operation
DANGER! Risk of death!
When working on an open switchgear, there is a risk of electrocution in the event of
contact with active conductors.
This work must only be carried out by qualified personnel!
After connecting the switchgear to the connection voltage as well as after each network cut-off, the
switchgear reverts to the operating mode set before the voltage cut-off.
6.2.1 Switchgear operating modes of the start/deactivation
After connection to the power supply, the switchgear can be switched on or off using the main switch.
Once the main switch has been activated, the system is instantly ready for operation. After several seconds,
the green signal lamp (Fig. 2, pos. 1) lights up.
WILO SE 01/2017
English
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