Operating Modes - Wilo Control EC-L Notice De Montage

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7.1.4 Operation with a defective level
sensor
7.2

Operating modes

7.2.1 "Drain" operating mode
Fig. 24: Illustration of the switching points with
a float switch in the "drain" operating mode
using the example of two pumps
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Operation
▪ Pumps are enabled (menu 3.01 to 3.04).
▪ The "Extern OFF" input is not active.
If the level sensor does not transfer a measured value (e.g. due to wire break, defective
sensor), all pumps are switched off. Furthermore, the fault signal LED lights up and the
collective fault signal is activated.
Emergency operation
▪ Operating mode "drain": High water level
If the high water level is performed by a separate float switch, the system can continue
running in emergency operation. The activation and deactivation points are defined by
the hysteresis of the float switch.
▪ Operating mode "fill": Min. water level
If the min. water level is monitored by a separate float switch, the system can continue
running in emergency operation. The activation and deactivation points are defined by
the hysteresis of the float switch.
NOTICE
Changing the operating mode
To change the operating mode, deactivate all pumps: in Menu 3.01, select the value
„OFF".
NOTICE
Operating mode after power failure
Following a power failure, the switchgear will automatically start up in the last oper-
ating mode set.
The following operating modes are possible:
▪ drain
▪ fill
The reservoir or pump chamber is drained. The pumps are activated when the level rises
and switched off when the level falls. This control is mainly used for water drainage.
Level measurement with float switch
1 Pump 1 On
2 Pump 2 On
5
3 Pump 1 and 2 Off
4 Dry-running level
2
5 High water level
Up to a maximum of five float switches can be connected. This can be used to control
1
two pumps:
▪ Pump 1 On
▪ Pump 2 On
3
▪ Pump 1 and 2 Off
▪ Dry-running level
4
▪ High water level
The float switch should be equipped with a NO contact: Once the switching point has
been reached, the contact is closed.
WILO SE 2018-12