Control Panel; Battery Back-Up Functions - Grundfos LC 108 Montage- Und Betriebsanleitung

10.3 Control panel

Drainage application, pages 199 and 200.
For these applications, the foil supplied with the LC 108 must be
attached to the CU 211 control panel as shown in fig. 28. The foil
can be found inside the LC 108 cabinet at the bottom.
Figure 28 shows how the foil is attached to the CU 211 module.
CU 211
Fig. 28
Figure 29 shows the control panel of the CU 211 module.
1
CU 211
1
12
11
10
9
8
7
Fig. 29
Key to the symbols in fig. 29:
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 10.5.
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 10.5.
Orange indicator light, which is activated by the flow
switch.
When the flow switch registers a liquid flow, the indicator
8 light is permanently on.
The pump is stopped if the flow switch does not register
any liquid flow and the dead time has expired,
see section 10.2.
9
Have no function in connection with the actual
and
application!
10
Orange indicator light, which is activated by the switch for
manual restarting.
The pump is started when the switch is set to position on
11 (restarting) (the indicator light is permanently on).
The pump is stopped if the flow switch does not register
any liquid flow and the dead time has expired, see
section 10.2.
Green indicator light, indicating that the electricity supply
12
has been switched on.
1
1
2 3 4 5
1

10.4 Battery back-up functions

Drainage application, pages 199 and 200.
If a back-up battery for CU 211 (accessory for certain variants) is
installed, the following functions will be carried out if the normal
electricity supply to the LC 108 fails (see also the illustrations
below):
• The common alarm is active, the red indicator light is on -
cannot be reset!
• If the external alarm device for common alarm is supplied from
an external power source, this device will be active - cannot be
reset by means of the reset button!
• The built-in buzzer (only certain variants) is activated - can be
reset by means of the reset button!
The table below shows the situation which may occur if the
normal electricity supply to the LC 108 fails and a back-up battery
is connected:
= the indicator light is off.
= the indicator light is on.
= the indicator light is flashing.
Mains supply failure:
CU 211
1
• The common alarm is active.
The red indicator light is on.
• The green indicator light (electricity
supply switched on) is off.
35