CU 200 is a combined status, control and communication unit designed for the SQFlex system. It can be connected to a level switch and is designed for SQFlex power range up to 1400 W and maximum 8.4 A.
CU 200 incorporates cable entries for the following connections:
• power supply (pos. 6)
• pump (pos. 7)
• earth (pos. 8)
• level switch (pos. 9).
The communication between CU 200 and the pump is ensured through the power supply cable. This is called mains-borne signaling (or power line communication), which does not require extra cables between CU 200 and the pump.
Start, stop and reset the pump with the ON/OFF button (pos. 1).
CU 200 ensures system monitoring and alarm indication. The operation can be monitored through the following indications:
• water reservoir full (level switch) (pos. 2)
• pump running (pos. 3)
• input power (pos. 11).

CU 200 indicates the following alarms:
• dry running (pos. 10)
• service needed (pos. 5):
- no contact to the pump
- overvoltage
- overtemperature
- overload.
In addition, CU 200 shows the symbols of the energy supply options (pos. 4).