Control Panel; Elements On The Control Panel; Display; Power On" Light Field - Grundfos ALPHA1 Series Installation And Operating Instructions Manual

7. Control panel

7.1 Elements on the control panel

ALPHA1
POWER
ON
Fig. 8 GRUNDFOS ALPHA1 control panel
The control panel comprises:
Pos. Description
Display showing the actual pump power
1
consumption in Watt
2

"POWER ON" light field

3 Seven light fields indicating the pump setting
4

Push-button for selection of pump setting

7.2 Display

The display (fig. 8, pos. 1) is on when the power supply has been
switched on.
The display shows the actual pump power consumption in Watt
(integer) during operation.
Faults preventing the pump from operating
properly (for example seizing-up) are indicated in
Note
the display by "- -". See section 12. Fault finding.
If a fault is indicated, correct the fault and reset the pump by
switching the power supply off and on.
If the pump impeller is rotated, for example when
filling the pump with water, sufficient energy can
Note
be generated to light up the display even if the
power supply has been switched off.
7.3 "POWER ON" light field
The "POWER ON" light field (fig. 8, pos. 2) is on when the power
supply has been switched on.
When the "POWER ON" light field is on only, a
fault preventing the pump from operating
Note
properly (for example seizing-up) has occurred.
See section 12. Fault finding.
If a fault is indicated, correct the fault and reset the pump by
switching the power supply off and on.

7.4 Light fields indicating the pump setting

The pump has seven optional settings which can be selected with
the push-button. See fig. 8, pos. 4.
The pump setting is indicated by seven different light fields.
See fig. 9.
1
2
3
4
Fig. 9
Number of
button
presses
0
1
2
3
4
5
6
7
See section 11. Pump settings and pump performance for
information about the function of the settings.
7.5 Push-button for selection of pump setting
Every time the push-button (fig. 8, pos. 4) is pressed, the pump
setting is changed.
A cycle is seven button presses. See section 7.4 Light fields
indicating the pump setting.
POWER
ON
III II I PP1
Seven light fields
Light
Description
field
PP2
(factory Highest proportional-pressure curve
setting)
CP1 Lowest constant-pressure curve
CP2 Highest constant-pressure curve
III Constant speed, speed III
II Constant speed, speed II
I Constant speed, speed I
PP1 Lowest proportional-pressure curve
PP2 Highest proportional-pressure curve
CP1
PP2 CP2
17