20
11. Indicator lights and signal relay
The operating condition of the pump is indicated by the green and
red indicator lights on the pump control panel, fig. 31.
Fig. 31
Indicator lights on control panels of single- and three-
phase pumps
The pump incorporates an output for a potential-free signal via an
internal relay.
The signal output can be set to fault, operating or ready indication
by means of the R100, see section
operating or ready signal relay.
The functions of the two indicator lights and the signal relay are
as shown in the following table:
TM
00
7
600
03
04
/ TM
02
8
513
03
04
Green
Red
Green
Red
Indicator lights
Signal relay activated during:
Description
Fault
(red)
Opera-
tion
(green)
Fault
Operation
Ready
Off
Off
The electricity supply has been switched off.
Off
Perma-
nently on
The pump is operating.
Off
Flashing
The pump has been set to stop.
Perma-
nently on
Off
The pump has stopped because of a fault. 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.
Perma-
nently on
Perma-
nently on
The pump is operating, but it has been stopped because of
a fault.
If the cause is "sensor signal outside signal range", the
pump will continue operating according to the max. curve
and the fault indication cannot be reset until the signal is in-
side 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 in-
side the signal range.
Perma-
nently on
Flashing
The pump has been set to stop, but it has been stopped be-
cause of a fault.
NC
NO
C
NC
NO
C
NC
NO
C
NC
NO
C
C
NO NC
C
NO NC
NC
NO
C
NC
NO
C
C
NO NC
C
NO NC
NC
NO
C
NC
NO
C
C
NO NC
C
NO NC
C
NO NC
C
NO NC
NC
NO
C
C
NO NC
Grundfos.bk Page 20 Tuesday, April 17, 2007 8:54 AM
