Operating The Product; Motor Protection - Grundfos LC 231 Manual Del Usuario

6.14 Operating the product

6.14.1 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
6.14.2 Manual operation
6.14.2.1 Starting and stopping the pump manually
with Grundfos GO Remote
1. Go to Settings > Control, pump 1.
2. Start the pump by selecting On and pressing OK.
3. Stop the pump by selecting Off and pressing OK.
Related information
6.14.2.3 Choosing what the pump must do after
manual start
6.14.2.2 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
6.14.2.3 Choosing what the pump must do after
manual start
6.14.2.3 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:
18
• 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
6.14.2.2 Starting and stopping the pump manually
with the operating panel
6.14.2.1 Starting and stopping the pump manually
with Grundfos GO Remote

6.15 Motor protection

Make sure that all settings are entered
according to the pump and system
requirements to avoid malfunction.
6.15.1 Overheat protection
The control unit offers thermal protection for the
connected motors. Two types of thermal-protection
sensor can be connected to the control unit: a PTC
sensor (analog) and a thermal switch (digital).
Under normal running conditions, the sensor will act
as a short circuit, but when its temperature limit is
reached, it will open and tell the control unit that the
temperature is too high, and the pump is stopped.
When the temperature has dropped to the sensor-
trigger level, the pump will return to normal running
conditions. It will not be possible to start the pump
manually as long as the temperature is too high.
Related information
6.12 Setting the maximum number of restarts with
Grundfos GO Remote
6.15.4 Setting the motor protection with Grundfos
GO Remote
8.12 Code 69 (Winding temperature too high)
6.15.2 Overload protection
The pump is protected by internal software-based
motor-protection.