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

4.3 Control panel

Parallel operation with 3 float switches, pages
Figure 8 shows the control panel of the CU 212 module.
1
CU 212
1
2
12
11
10
9
8
7
Fig. 8
Key to the symbols in fig. 8:
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, 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 for pump 1, three
5
positions, see section 4.5.
ON-OFF-AUTO selector switch for pump 2, three
6
positions, 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 of the first pump/common stop.
Orange indicator light, which is activated by the float
9
switch for start of the next pump.
Two orange indicator lights, which are activated by the
10
float switch for high-level alarm. In case of high-level
and
alarm, the top indicator light is flashing and the other is
11
permanently on.
Green indicator light, indicating that the electricity
12
supply has been switched on.
10
142 and 143.
2 3 4 5 6
1 2

4.4 Battery back-up functions

Parallel operation with 3 float switches, pages
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 liquid level in the pit rises above the level for high-level
alarm, the top orange indicator light will be flashing and the
second orange indicator light from the top will be permanently
on.
• 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 4.2.
The table below shows the situations 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.
Mains supply failure and high-level alarm:
• The common alarm is active.
The red indicator light is on.
CU 212
1
• The top orange indicator light is
2
flashing.
• The second orange indicator light from
the top is on.
• The green indicator light (electricity
supply switched on) is off.
142 and 143.