Control Panel; Battery Back-Up Functions - Grundfos LCD 108 Installations- Und Bedienungsanleitung

7.3 Control panel

Full-control operation, pages 148
Figure 17 shows the control panel of the CU 212 module.
1
CU 212
1
2
12
11
10
9
8
7
Fig. 17
Key to the symbols in fig. 17:
Pos. Description
Green indicator light for pump 1 and 2, indicating
1 starting delay (flashing) and pump operation
(permanently on).
Red indicator light for pump 1 and 2.
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 for pump 1, three
5
positions, see section 7.5.
ON-OFF-AUTO selector switch for pump 2, three
6
positions, see section 7.5.
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 7.5.
Orange indicator light, which is activated by the float
8
switch for stop of the last pump.
Orange indicator light, which is activated by the float
9
switch for stop of the last pump but one.
Orange indicator light, which is activated by the float
10
switch for start of the first pump.
Orange indicator light, which is activated by the float
11
switch for start of the next pump.
Green indicator light, indicating that the electricity
12
supply has been switched on.
22
and 149.
2 3 4 5 6
1 2

7.4 Battery back-up functions

Full-control operation, pages 148
If a back-up battery for CU 212 (accessory for certain variants) is
installed, the following functions will be carried out if the normal
electricity supply to the LCD 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!
• If the starting delay function and automatic test run were
selected (switch 4 of the DIP switch), the start-up will be
delayed after the electricity supply has been switched on when
the liquid level is sufficiently high, see section 7.2.
The table below shows the situation which may occur if the
normal electricity supply to the LCD 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 212
1
• The common alarm is active.
2
The red indicator light is on.
• The green indicator light (electricity
supply switched on) is off.
and 149.