Grundfos ALPHA1 L Serie Instrucciones De Instalación Y Funcionamiento página 21

9. Fault finding the product
If the pump has detected one or more alarms, the first LED
switches from green to red. When an alarm is active, the LEDs
indicate the alarm type as defined in fig. Fault finding table.
If multiple alarms are active at the same time, the LEDs
only show the error with the highest priority. The priority is
defined by the sequence of the table.
When there is no active alarm anymore, the operating panel
switches back to operating status and the first LED switches from
red to green.
DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply before starting any work
on the product. Make sure that the power supply can-
not be accidentally switched on.
Display Status
ON
Alarm
The pump stops.
The pump is blocked.
V
230
ON
Alarm
The pump stops.
The supply voltage is low.
<160 V
ON
Alarm
The pump stops.
Electrical error.
V
230
Fault finding table
9.1 Deblocking the shaft
If the pump is blocked it is necessary to deblock the shaft. The
pump deblocking device is accessible from the front of the pump
without having to demount the control box. The force of the device
is high enough to deblock pumps, which are seized by lime, for
example if the pump has been turned off during summer.
Course of action:
1. Switch off the power supply.
2. Close the valves.
3. Locate the deblocking screw in the centre of the control box.
Use a star screwdriver with a size 2 Phillips tip to push the
deblocking screw inwards.
4. When the screw can be turned counterclockwise, the shaft has
been deblocked. Repeat step 3, if necessary.
5. Switch on the power supply.
1
1/On
3
0/Off 5 mm
2
Deblocking the shaft
Solution
Deblock the shaft. See sec-
tion Deblocking the shaft.
Make sure that there is suffi-
cient voltage supply to the
pump.
Replace the pump and send
the pump to the nearest
Grundfos Service Center.
No.2
CAUTION
Hot surface
Minor or moderate personal injury
‐
The pump housing may be hot due to the pumped liq-
uid being scalding hot. Close the isolating valves on
both sides of the pump and wait for the pump housing
to cool down.
CAUTION
Pressurised system
Minor or moderate personal injury
‐
Before dismantling the pump, drain the system or
close the isolating valves on both sides of the pump.
The pumped liquid may be scalding hot and under
high pressure.
1
1/On
0/Off
2
1
1/On
3
0/Off
2
Related information
9.1 Deblocking the shaft
Before, during and after the deblocking, the device is tight
and must not release any water.
3
5 mm
5 mm
No.2
No.2
4
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