Start-Up; Indication; Alarm Resetting; Maintenance - Grundfos IO 112 Installations- Und Bedienungsanleitung

9. Start-up

When the IO 112 has been installed as described in
6. Installation, start-up must be carried out by an
authorized person.
1. Switch on the electricity supply to the IO 112
before starting the pump.
2. IO 112 now carries out a self-test. All indicator
lights on the front panel will be on for a few sec-
onds. If IO 112 does not detect any fault, all indi-
cator lights will go out. If a fault is detected, the
indicator lights for the actual fault will illuminate.
3. Check that there are no warnings or alarms
before switching on the pump.

10. Indication

On the front of IO 112, a column of six indicator
lights show the measured value. Depending on
whether the measured value is set to count up or
down, the indicator lights will illuminate from the bot-
tom or the top.
AI
2
90
75
Reset
60
45
30
1
15
%
Fig. 11 Indicator lights and reset button on
IO 112
Pos. Symbol Description
Reset button
If the reset button is pressed for
less than 3 seconds, all alarm
indicator lights will go out. If the
cause of the alarm has not been
remedied, the indicator lights will
1 illuminate again after three sec-
Reset
onds.
If the reset button is pressed for
more than 3 seconds, the CNT
indicator light will go out, and the
counter value will be reset to its
starting point.
Pump status indicator light
The pump status indicator light is
2 on when the pump is in operation
and the contactor feedback K
is on.
AI indicator light
On: When the six value indicator
lights show the measured values
of the analog input.
AI
3
Flashing: During the setting of the
limits of the analog input and when
the measured value is outside the
range of 4-20 mA.
3
4
IO 112 IO 112
PT CNT
5
120 600
100 500
80 400
60 300
40 200
20 100
o
C Pulse
6
- K
1
PT indicator light
On: When the six value indicator
lights show the measured values
PT of the temperature sensor input.
4
Flashing: During the setting of the
limits of the temperature sensor
input, and when the measured
value exceeds the alarm limit set.
CNT indicator light
On: When the six value indicator
lights show the measured values
of the counter input.
CNT
5
Flashing: During the setting of the
alarm limit of the counter input and
when the measured value exceeds
the alarm limit set.
•
Value indicator lights
•
The six value indicator lights show
•
the momentary value of the param-
6
eter chosen (AI, PT or CNT). They
•
are also used for the setting of the
•
limits of these parameters.
•

10.1 Alarm resetting

Alarms can be reset by means of terminals R1 and
R2 (pos. 9).
Manual resetting
Alarms can be reset by short-circuiting R1 and R2.
The reset button (pos. 1) also short-circuits R1 and
R2.
Automatic resetting
If a permanent short-circuit is made between R1 and
R2, alarms are automatically reset when the alarm
cause has disappeared.

11. Maintenance

IO 112 requires no maintenance. IO 112 must only
be cleaned with a dust-free cloth.

12. Service

IO 112 cannot be serviced. If the module is faulty, it
must be replaced.
2
15