Servicing The Product; Updating The Product Software; Replacing The Control Unit; Replacing The Cim Module - Grundfos CU 241 Instrucciones De Instalación Y Funcionamiento

Related information
7.1.4 Choosing what the pump must do after manual start
7.1.2 Automatic operation
In automatic operating mode, the control unit starts and stops the
pump based on the signals it receives from the connected level
sensors and the corresponding level settings within the control unit.
Related information
4.4 Application types
7.1.3 Starting and stopping the pump manually with the
operating panel
1. To start a pump manually, press and hold the Pump button until
the pump starts.
The On indicator light is lit when the pump is operating in
manual mode.
2. Stop the pump by pressing the Pump button.
The Off indicator light is lit when the pump is stopped.
Related information
7.1.4 Choosing what the pump must do after manual start
7.1.4 Choosing what the pump must do after manual start
The following can be configured:
• Automatic return
Here you select if the pump must automatically return to a
defined operating mode when the manual start ends.
• Return to
Here you select whether the pump must return to automatic
operating mode or stop when the manual start ends and
Automatic return has been enabled.
• Forced start time
Here you set the time period in which the pump must run in
manual operating mode.
1. Go to Settings > Manual start.
2. Select Automatic return and choose one of the following
options:
• Disabled
• Enabled.
3. Go one step back in the menu and select Return to.
4. Choose one of the following options:
• Auto
• Off.
5. Go one step back in the menu and select Forced start time.
6. Set the time period in which the pump must run in manual
operating mode.
Related information
7.1.1 Starting and stopping the pump manually with Grundfos GO
Remote
7.1.3 Starting and stopping the pump manually with the operating
panel

8. Servicing the product

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the incoming power supply before you start
any work on the product or connected pumps.
‐
Make sure that the power supply cannot be switched
on accidentally.

8.1 Updating the product software

New features and functions can be made available during the
product's life cycle.
1. Contact Grundfos to get your product software updated.
14

8.2 Replacing the control unit

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before making any
electrical connections.
‐
Make sure that the power supply cannot be switched
on accidentally.
Remember to save the controller's settings in Grundfos GO Remote
under Settings. The settings can then be transferred to the new
control unit when installed.
1. Switch off the power supply to the product and
other components with external supply.
2. Write down the terminal connection of each wire to ensure
correct re-connection.
3. Disconnect all wires.
4. Remove the control unit from the panel or cabinet.
5. Fit the new unit.
6. Connect all wires.
7. Configure the new control unit using Grundfos GO Remote.
Related information
2.2.1 Mounting the control unit
3.2 Startup wizard on Grundfos GO Remote

8.3 Replacing the CIM module

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before making any
electrical connections.
‐
Make sure that the power supply cannot be switched
on accidentally.
1. Switch off the power supply to the product and
other components with external supply.
2. Write down the terminal connection of each wire to ensure
correct re-connection.
3. Disconnect all wires connected to the CIM module.
4. Remove the screws that holds the module.
5. Remove the module from the control unit.
6. Fit the new module.
7. Connect all wires.

8.4 Replacing the battery

CAUTION
Fire and chemical leakage
Minor or moderate personal injury
‐
Risk of explosion if the battery is replaced by an
incorrect type.
To replace the battery, do the following:
1. Remove the back cover.
2. Gently grab around the battery without touching it too much.
3. Pull the battery up.
4. Insert a new battery of the correct type.
Related information
10. Technical data