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Condition
1)
Empty tank
Analog signal < 2 mA
The pump is running,
but the dosed
is too small according
to the signal from the
2)
dosing monitor
Overheating
Internal communication
fault
3)
Internal Hall fault
4)
Diaphragm leakage
Maximum pressure
4)
exceeded
More pulses than
capacity
No motor rotation
3)
detected
1)
Requires connection to level sensors. See section Empty tank (alarm).
2)
Requires activation of the dosing monitoring function and connection to a dosing monitor.
3)
Please contact a Grundfos service centre.
4)
Alarms can be reset when the faults have been corrected.
5)
The pump will make 10 attempts to restart before going into permanent OFF mode.
Related information
5.22 Empty tank (alarm)
Green LED
Red LED
Off
Off
On
Off
Off
Off
Off
5)
Off
On
Off
Display
On
EMPTY
On
NO mA
On
NO FLOW
On
MAX. TEMP.
On
INT. COM.
On
HALL
On
LEAKAGE
On
OVERLOAD
On
MAX. FLOW
On
ORIGO
Alarm output
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
1
2
3
C
NO
NC
19
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