Wilo -Control SC-Fire Electric A2P Installation And Operating Instructions Manual page 11

Operating mode
You can define the operating mode of the switchgear by selecting one of the three positions of the key
switch "Auto", "0" or "Manual".
Starting the
motor with...
AUTO
Key
OFF
switch 2
MANUAL
Table 3: Operating modes
Automatic mode
The key switch (Fig. 1, pos. 4, 5) is placed in the "Auto" position, the "Auto" position is thus confirmed by the
corresponding green LEDs (Fig. 2, pos. 15, 16).
The unit starts up automatically once the pressure switch no. 1 opens and the key switch no. 1 is in the "Auto"
position or once the pressure switch no. 2 activates and the key switch no. 2 is in the "Auto" position.
Any open pressure switch is signalled by a green LED for pressure switch 1 or a yellow LED for the pressure
switch 2 (Fig. 2, pos. 19, 20). Triggering of the float switch (low level of start-up tank) starts the pump if at least
one of the 2 key switches is in the "Auto" position.
Non-automatic mode
This mode is activated when the key switches are not in the "Auto" position.
This operating mode is signalled by the red LEDs (Fig. 2, pos. 17, 18).
Furthermore, the output "NON-AUTO MODE 1/2" is activated.
Manual mode
To perform a manual start-up, place one of the key switches in the "Man" position. The manual start button "ON"
(Fig. 2, pos. 8) enables start-up of the pump.
Deactivation mode
To switch off the pump, at least one of the key switches must be in the "0" position.
As soon as the pressure switch or the float switch is no longer activated, the pump can be switched off by
means of the "OFF" button (Fig. 2, pos. 12).
Pump start-up
In auto mode, if the pressure measured by at least one of the two pressure switches is below the switch-on
threshold, the LED/LEDs ("active" Fig. 2, pos. 19 and pos. 20) turn/s on green for pressure switch 1 or yellow
for pressure switch 2. Once the follow-up time has elapsed (see menu 1.2.5.1) the pump starts.
Note: If the follow-up time (menu 1.2.5.1) is quite long, it is possible to see the LED flashing while the follow-up
time elapses.
The LED ("on" Fig. 2, pos. 13) turns on green and signals the operation of the pump. Throughout pump
operation, the instantaneous current of the pump is monitored and displayed on the screen. When a malfunction
arises, and even if the pump continues to function, the error code of the malfunction is displayed for
30 seconds.
Installation and operating instructions Wilo-SC-Fire Electric A2P
AUTO
Pressure switch 1
Pressure switch 2
Float switch
Pressure switch 1
Float switch
Pressure switch 1
"ON" button
Float switch
Key switch 1
OFF
Pressure switch 2
Float switch
-
"ON" button
English
MANUAL
"ON" button
Pressure switch 2
Float switch
"ON" button
"ON" button
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