Control Panel - Grundfos LC 108 Montage- Und Betriebsanleitung

AC/DC selector:
The AC/DC selector switch for electrodes and/or float switches is
placed as shown in fig. 6.
Fig. 6
Operation with electrodes and
float switches:
Selector switch in position AC:
It is possible to connect
13-18 VAC 0 V
3 electrodes (1 as reference
electrode) and 2 float switches.
AC 1 2 G 3 4
The controller transmits a
AC DC
13-18 VAC signal.
Operation with float switches:
Selector switch in position AC:
It is possible to connect 4 float
13-18 VAC 0 V
switches.
The controller transmits a
AC 1 2 G 3 4 13-18 VAC signal.
AC
DC
Operation with float switches:
Selector switch in position DC:
It is possible to connect 4 float
switches.
0 V
12 VDC
Cables of up to 100 metres can be
connected between the controller
AC 1 2 G 3 4
and the float switches.
AC DC
The controller transmits a 12 VDC
signal.
If the distance between the controller and pit
exceeds 20 metres, it is not advisable to use
electrodes as problems with the signal values
Note
sent back to the controller may arise.
In such cases, it is recommended to use float
switches.
10

4.3 Control panel

2 float switches, pages 187 and 188.
Figure 7 shows the control panel of the CU 211 module.
1
CU 211
1
12
11
10
9
8
7
Fig. 7
Key to the symbols in fig. 7:
Pos. Description
Green indicator light, indicating starting delay (flashing)
1
and pump operation (permanently on).
Red indicator light, indicating pump fault.
2 Flashing: Fault in PTC resistor/thermal switch.
On: Fault in motor-protective circuit breaker.
Red indicator light, indicating wrong phase sequence
3
(only certain variants and three-phase pumps only).
4 Red indicator light, indicating common alarm.
ON-OFF-AUTO selector switch, three positions,
5
see section 4.5.
Reset button, push-button for manual resetting of alarm
7 signals to external alarm devices and the built-in buzzer
(only certain variants), see section 4.5.
Orange indicator light, which is activated by the float
8
switch for start/stop of pump.
3 orange indicator lights, which are activated by the float
9, 10 switch for high-level alarm.
and In case of high-level alarm, the top indicator light is
11 flashing and the two other indicator lights are
permanently on.
Green indicator light, indicating that the electricity supply
12
has been switched on.
2 3 4 5
1