Grundfos NBE Series - 7.24 Service; 7.24.1 Time to next service (Motor bearing service); 7.24.2 Bearing replacements; 7.24.3 Bearings replaced (Motor bearing maintenance)

When the function is set to Active, a counter in the controller starts
counting the running hours of the bearings. The running hours are
calculated on the basis of the motor speed. When a predefined limit
is reached, a warning indicates that the bearings must be replaced
or relubricated.
If you change the function to Not active, the counter
continues to count. However, no warning is given when it
is time to replace the bearings. If you change the function
to Active again, the accumulated running hours are used
to recalculate the replacement time.
7.24 Service
Pump variant Service
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
7.24.1 Time to next service (Motor bearing service)
This display shows when to replace the motor bearings. The
controller monitors the operating pattern of the motor and calculates
the period between bearing replacements.
Displayable values:
• in 2 years
• in 1 year
• in 6 months
• in 3 months
• in 1 month
• in 1 week
• Now!
7.24.2
Bearing replacements
The display shows the number of bearing replacements made
during the lifetime of the motor.
7.24.3
Bearings replaced (Motor bearing maintenance)
When the bearing monitoring function is active, a warning is given
when the motor bearings must be replaced.
1. When you have replaced the motor bearings, press Bearings
replaced.
7.24.4
Bearings relubricated
When the bearing monitoring function is active, a warning is given
when the motor bearings must be relubricated.
Bearings can be relubricated 5 times before they must be
replaced.
The amount of grease can be found on the bearing
nameplate on the motor.
1. When you have relubricated the bearings, press Bearings
relubricated.
7.25
Communication
Pump variant Communication
NBE, NKE, NBSE, VLSE ●
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
Use this function to set the communication of the product, both
wired and wireless communication. The product contains built-in
fieldbus protocols on the AYB terminals (RS-485).
7.25.1
Pump number
Use this function to allocate a unique number to the pump. This
makes it possible to distinguish between pumps in connection with
GENIbus communication.
7.25.2 Enable/disable radio comm.
Use this function to set the radio communication to Enabled or
Disabled. Select Disabled in areas where radio communication is
not allowed.
Bluetooth communication remains active.
7.25.3 Enable/disable Bluetooth comm.
Use this function to set the Bluetooth communication to Enabled or
Disabled. Select Disabled in areas where Bluetooth
communication is not allowed.
Radio communication remains active.
7.25.4 Initiate Bluetooth connection
Use this function if Grundfos GO is installed on Huawei
smartphones with BLE version 5.0 or older. This function is used to
establish a Bluetooth connection to Grundfos GO. Open the
Grundfos GO app on your device and select Initiate Bluetooth
connection. Then select Yes and follow the instructions on the
device.
7.25.5
Setup of AYB terminals
7.25.5.1 Protocol selection
Use this function to select which fieldbus protocol that must be
active on the AYB terminals (RS-485).
Select between the following:
• Modbus RTU
• GENIbus.
7.25.5.2
Modbus RTU settings
1
4
4
4
5
4
6
2
3
4
TM083380
Example of Modbus network with termination
Pos. Description
1 Master
2 Passive tap
3 Line termination
59
English (US)