Grundfos LC 232 User Manual

2. Stop the pump by pressing the Pump button.
The Off indicator light is lit when the pump is stopped.
Related information
6.14.2.1 Starting and stopping the pump manually with Grundfos
GO Remote
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:
• 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
6.14.2.1 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
8.13 Code 69 (Winding temperature too high)
6.15.2
Overload protection
The pump is protected by internal software-based motor protection.
Related information
6.12 Setting the maximum number of restarts with Grundfos GO
Remote
8.9 Code 48 (Motor is overloaded)
6.15.3
Moisture protection
When a moisture sensor is installed in series with the temperature
sensor, the control unit needs to know how to determine whether
there is a high temperature or moisture in the pump. If the
temperature is too high, normally the temperature sensor will go
back to its normal stage when the temperature has dropped to its
trigger level. If there is moisture in the pump, then the moisture
sensor will keep the series connection open until the pump is
opened and serviced.
To determine which sensor has been active, a cool down
time must be entered. This is the time that will normally pass until
the temperature has dropped enough for the temperature sensor to
return to its normal stage. If the cool down time is exceeded, the
control unit will assume that there is moisture in the pump, and it
will send a moisture alarm.
Related information
6.15.4 Setting the motor protection with Grundfos GO Remote
6.15.4 Setting the motor protection with Grundfos GO Remote
You can set the current, temperature and moisture protection via a
setup wizard.
1. Go to Settings > Motor protection pump 1.
2. Follow the on-screen wizard to set the following:
• Nominal pump current
• Trip IEC class
• Trip class P delay
• Overheat protection.
Related information
2.3.3 Connecting the pump supply and power supply
6.12 Setting the maximum number of restarts with Grundfos GO
Remote
6.15.3 Moisture protection
6.15.5 Trip classes
6.15.6 Contactor Current Protection (CCP)
8.10 Code 51 (Blocked)
8.24 Code 220 (Contactor wear out)
6.15.5
Trip classes
LC 23X offers two ways of motor protection:
• an adjustable trip class (P)
• trip classes according to the IEC standard that defines trip
classes (5, 10, 20 and 30).
Related information
6.15.4 Setting the motor protection with Grundfos GO Remote
6.15.5.1
Trip class "P"
The trip delay indicates the maximum period of time during which
the overload condition is allowed to exist within a period of 0.1 - 30
seconds.
3
4
1
2
Y
X
TM072271
An example with trip delay = 4 seconds
Pos.
Description
Y Current [A]
X Time [s]
1 Nominal motor current
2 Trip delay [s]
3 Curve with tripping
4 Curve without tripping
16
English (GB)

Grundfos LC 232 Specifications

General

Brand	Grundfos
Model	LC 232
Category	Water Pump
Language	English