Operating Panel; Elements On The Operating Panel; Power On" Light Field; Light Fields Indicating The Pump Setting - Grundfos ALPHA2 L Series Installation And Operating Instructions Manual

9. Operating panel

9.1 Elements on the operating panel

ALPHA2 L 25-40 180
POWER
ON
Fig. 10 GRUNDFOS ALPHA2 L operating panel
The operating panel comprises:
Pos. Description
1

"POWER ON" light field

2 Seven light fields indicating the pump setting
3

Push-button for selection of pump setting

9.2 "POWER ON" light field
The "POWER ON" light field (fig. 10, 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 properly (for
example seizing-up) has occurred. See section
13. Fault finding the
If a fault is indicated, correct the fault and reset the pump by
switching the power supply off and on.
1
2
3
product.

9.3 Light fields indicating the pump setting

The pump has seven optional settings which can be selected with
the push-button. See fig. 10, pos. 3.
The pump setting is indicated by seven different light fields. See
fig. 11.
POWER
III II I
Fig. 11 Seven light fields
Number of
button Light field
presses
PP2
0
(factory setting)
1 CP1
2 CP2
3 III
4 II
5 I
6 PP1
7 PP2
See section
12. Pump settings and pump performance
information about the function of the settings.
9.4 Push-button for selection of pump setting
Every time the push-button (fig. 10, pos. 3) is pressed, the pump
setting is changed.
A cycle is seven button presses. See section
indicating the pump setting.
ON
CP1
PP2 CP2
PP1
Description
Highest proportional-pressure
curve
Lowest constant-pressure
curve
Highest constant-pressure
curve
Constant speed, speed III
Constant speed, speed II
Constant speed, speed I
Lowest proportional-pressure
curve
Highest proportional-pressure
curve
for
9.3 Light fields
11