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16
External Off
It is possible to deactivate the control device externally using a normally closed contact.
This function takes priority; all pumps running in automatic mode are switched off.
Operation in the event of an output pressure sensor fault
If an output pressure sensor malfunctions (e.g. wire break), the behaviour of the control
device can be set. The system is either switched off or continues to run with a pump. In the
SCe version, the speed of this pump can be set in the menu.
•
Set the behaviour in case of malfunction of the output pressure sensor: System→-
Sensors→Discharge side sensor fault
Operation in the event of malfunction of the supply pressure sensor (only SCe)
If a supply pressure sensor malfunctions, the pumps are switched off. If the fault is
remedied, the unit switches back to automatic mode.
If emergency operation is required, the unit can continue to be operated temporarily in the
p-c control mode. To do so, the use of the supply pressure sensor must be deactivated
("OFF").
•
Set control mode: Control settings→Control→Control mode
•
Deactivate the supply pressure sensor: System→Sensors→Suction side measurement
range
CAUTION
Damage to property due to dry run!
Dry running can damage the pump.
• We recommend connecting additional digital protection against low
water level.
The emergency operation setting must be cancelled after replacement of the supply pres-
sure sensor to ensure the reliable operation of the unit.
Operation in the event of malfunction of the bus connection between the control
device and pumps (only SCe)
There is the option to choose between stopping the pumps and operating at a defined
speed in the event of a communication malfunction. The setting can only be made by Wilo
customer service.
Pump operating mode
The operating mode can be set for pumps 1 to 4 (Manual, Off, Auto). In the SCe version, the
speed can be set in "Manual" operating mode.
•
Set operating mode of each pump: Control settings→Standby→Pump mode
Setpoint changeover
The control system can work with 2 different setpoints. They are set in the menus "Control
settings→Setpoints→Setpoints 1" and "Setpoints 2".
•
Set setpoint changeover: Control settings→Setpoints→Setpoints 1 and
Control settings→Setpoints→Setpoints 2
Setpoint 1 is the reference setpoint. Switching to setpoint 2 is performed by closing the
external digital input (according to the circuit diagram) or by activation via preset timing.
•
Activate timing: "Control settings→Setpoints→Setpoints 2" menu
Remote setpoint adjustment
Remote adjustment of the setpoint via an analogue current signal can be carried out using
the corresponding terminals (according to the circuit diagram).
•
Activate remote setpoint adjustment: Control settings→Setpoints→External setpoint
The input signal is always related to the sensor measuring range (e.g., 16 bar sensor: 20 mA
corresponds to 16 bar).
If the input signal is not available when remote setpoint adjustment is activated (e.g., due
to a cable break in the 4 ... 20 mA measurement range), an error message is issued and the
control device uses the selected internal setpoint 1 or 2 (see "Setpoint changeover").
Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09
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