7.2 Constant pressure
The integrated speed controller keeps a constant pressure in the pipe system. A pressure sensor monitors changes in the water consumption
and signals to the speed controller to adjust the motor speed up or down.
7.3 Pump alternation
Pump alternation ensures that the operating hours are distributed evenly on the pumps over time. The pumps alternate automatically, so that
the system starts the available pump with the lowest number of running hours since the last time the power was switched off.
7.4 Multimaster function
If the master pump is switched off or stopped due to an alarm, the next pump will automatically take over the control of the system.
7.4.1 Master pump in systems with two or more outlet-pressure sensors
If two or more pumps in the system are configured with an outlet-pressure sensor, they can all function as master pumps.
As standard, the pump with the lowest number will be the master pump. The master pump is marked with number 1 from the factory.
If master pump 1 is switched off or stopped due to an alarm, one of the other master pumps will automatically take over the control of the
system.
7.5 Dry-running protection
Dry-running protection automatically stops the pump in case of dry running to prevent damage to the pump.
The dry-running protection functions differently during priming and operation.
7.6 Bus signal
The product enables serial communication via an RS-485 input. The communication is carried out according to the Grundfos GENIbus
protocol and enables connection to a building management system or another external control system.
Via a bus signal, you can remote-set operating parameters, such as setpoint and operating mode. At the same time, the product can provide
status information about important parameters, such as the actual value of the control parameter, input power and fault indications, via the
bus.
Contact Grundfos for further information.
If you use a bus signal, the local settings made via Grundfos GO Remote or the advanced operating panel will be overruled.
In case the bus signal fails, the product will run with the local settings made via Grundfos GO Remote or the advanced operating
panel.
7.7 Fault and warning signals
7.7.1 Grundfos Eye
The operating condition of the motor is indicated by Grundfos Eye on the motor operating panel.
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