Control Functions; On/Off Button; Indication Of Pump Operation - Grundfos CU 301 Instrucciones De Instalación Y Funcionamiento

4. Control functions

4.1 On/off button

Figure 11 shows the on/off button of CU 301.
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
Fig. 11
The green and red indicator lights in the on/off button
indicate pump operating condition as follows:
Indication Description
Green indicator light
The system is operational.
permanently on.
Green indicator light The system is not
off. operational.
Red indicator light Pump has been stopped by
permanently on. means of the on/off button.*
Red indicator light CU 301 is communicating
flashing. with Grundfos GO Remote.
* If you use the on/off button to stop the pump, you
must also use this button to restart the pump.
Any alarm indication can be reset by pressing the on/
off button.
If you press the on/off button for minimum 5
seconds, you start the pump, irrespective of any
active fault or alarm indications. When you release
the on/off button, the pump stops.
Green
Red

4.2 Indication of pump operation

On the graphical illustration on the CU 301 front, the
riser pipe shows running light when the pump is
operating. When the pump is not operating, none of
the indicator lights are on. See fig. 12.
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
Fig. 12
You can change the indicator light settings by using
Grundfos GO Remote. See section
lights.
5.3.12 Indicator
11