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Grundfos CRE - Page 27

Grundfos CRE
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The functions of the two indicator lights and the signal relay are as shown in the following table:
Indicator lights Signal relay activated during:
Description
Fault (red)
Operation
(green)
Fault/
Alarm,
Warning
and
Relubricate
Operating Ready
Pump
running
Off Off
NCNOC
NCNOC
NCNOC
NCNOC
The power supply has been switched off.
Off
Permanently
on
NCNOC
C NCNO
C NCNO
C NCNO
The pump is operating.
Off
Permanently
on
NCNOC
C NCNO
C NCNO
NCNOC
The pump is stopped by the stop function.
Off Flashing
NCNOC
NCNOC
C NCNO
NCNOC
The pump has been set to stop.
Permanently
on
Off
C NCNO
NCNOC
NCNOC
NCNOC
The pump has stopped because of a Fault/Alarm or is
running with a Warning or Relubricate indication.
If the pump was stopped, restarting will be attempted (it
may be necessary to restart the pump by resetting the
Fault indication).
If the cause is "external fault", the pump must be
restarted manually by resetting the Fault indication.
Permanently
on
Permanently
on
C NCNO
C NCNO
C NCNO
C NCNO
The pump is operating, but it has or has had a Fault/
Alarm allowing the pump to continue operation or it is
operating with a Warning or Relubricate indication.
If the cause is "sensor signal outside signal range", the
pump will continue operating according to the 70 %
curve and the fault indication cannot be reset until the
signal is inside the signal range.
If the cause is "setpoint signal outside signal range",
the pump will continue operating according to the min.
curve and the fault indication cannot be reset until the
signal is inside the signal range.
Permanently
on
Flashing
C NCNO
NCNOC
C NCNO
NCNOC
The pump has been set to stop, but it has been
stopped because of a Fault.
Resetting of fault indication
A fault indication can be reset in one of the following ways:
Briefly press the button or on the pump. This will not
change the setting of the pump. A fault indication cannot be
reset by means of or if the buttons have been locked.
Switch off the power supply until the indicator lights are off.
Switch the external start/stop input off and then on again.
Use the R100. See the section on fault indications.
When the R100 communicates with the pump, the red indicator light
will flash rapidly.
Related information
5.2.3 Fault indications
5.4.4 Signal relay
27
English (US)

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