Control Functions; On/Off Button; Indication Of Pump Operation; Pressure Setting - Grundfos CU 301 Mode D'emploi

5. Control functions

5.1 On/off button

Figure On/off button shows the on/off button of
CU 301.
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On/off button
Pos. Description
1 Red
2 Green
The green and red indicator lights in the on/off
button indicate pump operating condition as
follows:
Indication Description
Green indicator
light permanently The system is operational.
on.
Green indicator The system is not
light off. operational.
Pump has been stopped by
Red indicator light
means of the on/off button.
permanently on.
*
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 and hold the on/off button for 5
seconds, the pump starts, irrespective of any
active fault or alarm indications. When you
release the on/off button, the pump stops.
Setting the button to "OFF" does not
disconnect the power from the pump.
Before servicing the pump, remove
power at the service breaker.
12

5.2 Indication of pump operation

On the graphical illustration on the CU 301 front,
the drop pipe shows running light when the pump
is operating.
When the pump is not operating, none of the
indicator lights are on.
2
1
Indication of pump operation
You can change the indicator light settings by
using Grundfos GO Remote. See section
6.3.12 Indicator
Related information

5.3 Pressure setting

The two arrow buttons on the CU 301 front are
used for the pressure setting.
Pressure setting and indication
Indication of pressure setting
The system pressure set is indicated by a yellow
indicator light, which is permanently on.
Setting range: 40-100 psi.
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lights.
6.3.12 Indicator lights
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