Grundfos Multilift MSS Instrucciones De Instalación Y Funcionamiento página 15

5.2.1 Design
The LC 220 level controller incorporates the necessary
components such as relays and a control panel with indicator
lights for indication of operating conditions and fault indications.
Furthermore, it has a level input which is activated directly via the
pressure tube inside the collecting tank. Finally, it has terminals
for power supply, connection to the pump and an alarm signal
output for common alarm.
The front cover is closed by four bayonet fastenings with quarter
turn locks. On the left side, the locks are extended and connected
to the cabinet bottom with hinge strings.
5.2.2 Control elements and indicator lights
The table below gives a description of the function of the various
control elements and indicator lights:
Element Function
The operating mode is selected by the
ON-OFF-AUTO selector switch which
has three different positions:
POS I:
Starts the pump manually.
Selection of
POS O:
operating
• Stops the pump manually
mode
• Resets alarm indications.
POS AUTO:
Automatic operation. The pump will
start and stop according to the signal
from the level sensor.
Indication
of power Green indicator light, indicating that
supply the power supply is on.
status
Red and green indicator lights,
Indication
indicating pump status:
of pump
Green: Pump is running.
status
Red: Pump fault.
Red indicator light, indicating high
High-level water level. The LED lights up if the
alarm level sensor measures a certain level
in the collecting tank.
Red indicator light, indicating wrong
Phase-
phase sequence (three-phase pumps).
sequence
Change phase sequence by following
fault
the instruction in fig. 8.
Sensor
Red indicator light, indicating faulty or
failure
missing connection to the level sensor.
alarm
External Red indicator light, indicating an alarm
level alarm from an external level switch.
Yellow indicator light, indicating that it
Indication is time for service. This function can
of time for be switched on and off by the DIP
service switch. The factory setting is one year
according to EN 12056-4.
Description
Fig. 8 Changing phases of a three-phase controller with
phase inverter
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