Priority
Start/stop
button
Grundfos GO Remote or operating panel on
motor
Digital input
Bus communication
1
Stop
2
Stop
3
Manual
4
Maximum speed
/
User-defined speed
5
Stop
6
User-defined speed
7
Stop
8
Maximum speed
/
User-defined
speed
9
Minimum speed
10
Start
11
Maximum speed
12
Minimum speed
13
Minimum speed
14
Start
15
Start
*
Stop
and
Maximum speed
settings made with Grundfos GO Remote or on the motor operating panel can be overruled by another
operating-mode command sent from a bus, for example
Start
. If the bus communication is interrupted, the motor resumes its previous
operating mode, for example
Stop
, that was selected with Grundfos GO Remote or the motor operating panel.
Related information
8.1.2 Starting and stopping the booster system
9. Service
DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply to the product including the power supply for the signal relays. Wait at least 5 minutes before you
make any connections in the terminal box. Make sure that the power supply cannot be switched on accidentally.
DANGER
Magnetic field
Death or serious personal injury
‐
Do not handle the motor or rotor if you have a pacemaker.
If service of the product is required, contact Grundfos.
9.1 Maintaining the product
The internal pump parts are maintenance-free.
The motor has maintenance-free, greased-for-life bearings.
9.2 Cleaning the motor
Keep motor cooling fins and fan blades clean to ensure adequate cooling of the motor and electronics.
You must keep the motor clean to ensure sufficient cooling of the motor. If the product is installed in dusty environments, clean and check the
motor regularly. Take the enclosure class of the motor into account when cleaning.
9.3 Refilling the diaphragm tank
We recommend that you refill the tanks with nitrogen gas once a year.
Related information
5.3 Adjusting the diaphragm tank pressure
9.4 Further information on CMBE TWIN
See Grundfos Product Center for more information on CMBE TWIN, such as service kits and service instructions.
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English (GB)
