Grundfos LC 241 User manual

LC 241
Single and dual pump unit, North America
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

LC 241
English (US)
Installation and operating instructions ..........................................................4
Français (CA)
Notice d'installation et de fonctionnement ......................................................27
Español (MX)
Instrucciones de instalación y operación .......................................................53
Appendix A.............................................................................79
3
Table of contents

English (US) Installation and operating instructions
Original installation and operating instructions
Table of contents
1. General information ........................4
1.1 Limited warranty ...........................5
1.2 Hazard statements..........................5
1.3 Notes ..................................5
2. Installing the product .......................6
2.1 Location ................................6
2.2 Mechanical installation .......................6
2.3 Electrical connection.........................7
3. Starting up the product .....................10
3.1 Connecting to Grundfos GO Remote..............10
3.2 Startup wizard on Grundfos GO Remote ...........10
3.3 Startup wizard on the operating panel .............10
3.4 How to enable Bluetooth on the operating panel.......10
3.5 How to disable Bluetooth on the operating panel ......10
3.6 Configuring the input and output terminals using
Grundfos GO Remote .......................10
3.7 Testing the product.........................11
4. Product introduction.......................11
4.1 Product description ........................11
4.2 Intended use ............................11
4.3 Features ...............................11
4.4 Application types ..........................12
4.5 Terminals ..............................14
4.6 Identification.............................15
4.7 Supported communication interface modules and
protocols ...............................15
5. Control functions .........................16
5.1 Operating panel ..........................16
6. Setting the product........................17
6.1 Setting the application type with Grundfos GO Remote. ..17
6.2 Setting the sensor type ......................17
6.3 Setting the start level .......................17
6.4 Setting the stop level .......................17
6.5 Setting the high level .......................18
6.6 Stop delay ..............................18
6.7 Power-on delay ...........................18
6.8 Dry-running protection.......................18
6.9 Multipump settings .........................18
6.10 Using the same level switch for the start and stop level ..18
6.11 Antiseizing ..............................18
6.12 Signal-detection time .......................18
6.13 Setting the maximum number of restarts with Grundfos
GO Remote .............................19
6.14 Setting the service interval with Grundfos GO Remote . ..19
6.15 Operating the product .......................19
6.16 Motor protection ..........................19
6.17 Alarm reset .............................20
6.18 Setting the buzzer with Grundfos GO Remote ........20
6.19 Setting units for Grundfos GO Remote.............20
6.20 Setting units for the operating panel with Grundfos GO
Remote................................20
6.21 GENIbus ...............................20
6.22 Security ...............................21
6.23 Starting the startup wizard with the operating panel .....21
7. Servicing the product ......................22
7.1 Updating the product software..................22
7.2 Replacing the battery .......................22
7.3 Replacing the control unit.....................22
7.4 Replacing the CIM module ....................22
7.5 Replacing the fuse .........................22
8. Fault finding the product ....................23
8.1 Overview of alarm and warning codes .............23
8.2 Code 2 (Power phase missing) .................23
8.3 Code 4 (Too many motor restarts) ...............23
8.4 Code 9 (Power phase sequence wrong)............23
8.5 Code 12 (Service needed) ....................23
8.6 Code 22 (Moisture in motor of pump) .............23
8.7 Code 25 (Wrong configuration) .................24
8.8 Code 48 (Motor is overloaded) .................24
8.9 Code 57 (Missing water in the application) ..........24
8.10 Code 69 (Winding temperature too high) ...........24
8.11 Code 84 (Memory storage media faulty)............24
8.12 Code 117 (Door opened) .....................24
8.13 Code 159 (Communication error CIMxxx) ...........24
8.14 Code 165 (Signal fault) ......................24
8.15 Code 191 (High water level) ...................25
8.16 Code 205 (Level switch inconsistency) ............25
8.17 Code 225 (Communication error pump module) .......25
8.18 Code 226 (Communication error IO module) .........25
8.19 Code 229 (Water on floor) ....................25
9. Technical data ...........................26
10. Disposing of the product ....................26
1. General information
Read this document before you install the product.
Installation and operation must comply with local
regulations and accepted codes of good practice.
4
English (US)

1.1 Limited warranty
Products manufactured by Grundfos Pumps Corporation (Grundfos)
are warranted to the original user only to be free of defects in
material and workmanship for a period of 24 months from date of
installation, but not more than 30 months from date of manufacture.
Grundfos' liability under this warranty shall be limited to repairing or
replacing at Grundfos' option, without charge, F.O.B. Grundfos'
factory or authorized service station, any product of Grundfos
manufacture. Grundfos will not be liable for any costs of removal,
installation, transportation, or any other charges that may arise in
connection with a warranty claim. Products which are sold, but not
manufactured by Grundfos, are subject to the warranty provided by
the manufacturer of said products and not by Grundfos'
warranty. Grundfos will not be liable for damage or wear to products
caused by abnormal operating conditions, accident, abuse, misuse,
unauthorized alteration or repair, or if the product was not installed
in accordance with Grundfos' printed installation and operating
instructions and accepted codes of good practice. The warranty
does not cover normal wear and tear. To obtain service under this
warranty, the defective product must be returned to the distributor or
dealer of Grundfos' products from which it was purchased together
with proof of purchase and installation date, failure date and
supporting installation data. Unless otherwise provided, the
distributor or dealer will contact Grundfos or an authorized service
station for instructions. Any defective product to be returned to
Grundfos or a service station must be sent freight prepaid;
documentation supporting the warranty claim and/or a Return
Material Authorization must be included if so instructed. Grundfos
will not be liable for any incidental or consequential damages,
losses, or expenses arising from installation, use, or any other
causes. There are no express or implied warranties, including
merchantability or fitness for a particular purpose, which extend
beyond those warranties described or referred to above. Some
jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages and some jurisdictions do not allow
limitations on how long implied warranties may last. Therefore,the
above limitations or exclusions may not apply to you. This warranty
gives you specific legal rights and you may also have other rights
which vary from jurisdiction to jurisdiction. Products which are
repaired or replaced by Grundfos or authorized service center
under the provisions of these limited warranty terms will continue to
be covered by Grundfos warranty only through the remainder of the
original warranty period set forth by the original purchase date.
1.2 Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
DANGER
Indicates a hazardous situation which, if not avoided, will
result in death or serious personal injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious personal injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate personal injury.
The hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.3 Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
FM
Observe these instructions for explosion-proof products.
A blue or gray circle with a white graphical symbol
indicates that an action must be taken.
A red or gray circle with a diagonal bar, possibly with a
black graphical symbol, indicates that an action must not
be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
5
English (US)

2. Installing the product
2.1 Location
Install the product in a location that meets the following
requirements:
• Place the product in a flood-safe place.
• Make sure that the ambient temperature is within the limits.
• Install the product as close as possible to the connected
pumps, sensors, and accessories.
• The product must be easily accessible.
• Outdoor installation: enclosure, type 4X.
• Indoor installation: The product must be installed in a well-
ventilated room to ensure cooling of its components.
2.2 Mechanical installation
2.2.1 Installing the control unit
The product is designed to be mounted on a flat and vertical
surface. The cable glands must face downwards.
To ensure sufficient ventilation, allow at least 5.9 in (150
mm) of space on either side of the cabinet.
1. Drill holes in the surface. Use the measurements below
depending on the type of cabinet.
C
D
A
BE
TM074510
Three phase control box
Dimensions [mm]
A B C D E
16.26
(413) 12 (304.8) 20.1 (510.5)
16.75
(425.45) 8.38 (213)
C
D
A
BE
TM074512
Single phase control box
Dimensions [mm]
A B C D E
18.47
(469.1) 14 (355.6) 22.26 (565.4)
18.75
(476.25)
11.4
(289.5)
2. Insert wall plugs, if applicable.
3. Fit the four screws in the mounting holes and cross-tighten the
screws.
2.2.2 Installing a communication interface module
You can fit a communication interface module (CIM) in the control
unit to enable communication with external systems. The module is
optional and is not delivered with the product. See the installation
and operating instruction for the module regarding electrical
connections.
Use an antistatic service kit when handling electronic
components. This prevents static electricity from
damaging the components.
1. Remove the screw in the back cover of the CU product.
TM071905
2. Remove the back cover.
TM071906
6
English (US)

3. Break off the tap.
TM071977
4. Fit the CIM module.
1 Nm
TM071907
5. If supplied, place the labels on the back cover.
Type:
Kit Funct. module - Geni/RS485Op
0538
9854
CIM XXX
CIM XXX
96824795
V01
Prod. No.
Version Serial No.
P. C.
TM071908
6. Refit the back cover to the CU product, and secure it with the
mounting screw. Secure cables using the cable tie holders.
1.25 Nm
TM071909
Route the low-voltage wires from the CIM module through the
right side of the cable tray.
Related information
8.13 Code 159 (Communication error CIMxxx)
2.3 Electrical connection
2.3.1 Protection of control panel
Power supply circuit protection device and circuit breaker are
provided by the installer. The type and size should be based upon
local, state, and National Electrical Codes (NEC). Size the circuit
breaker according to the maximum full load amps (FLA) of
the panel. The rated conditional short-circuit current (SCCR) is 5 kA
for single-phase variants and 10 kA for three-phase variants.
Motor
horsepower
[Hp]
Number of pumps Motor FLA
[A]
Panel max.
FLA [A]
3155.5
2 10.5
5116 16.5
2 32.5
7.5 112 12.5
2 24.5
20
30
132 32.5
2 64.5
See the rated current for this specific product on the
product nameplate.
7
English (US)

Related information
4.6.1 Nameplate
2.3.2 Protection of control power transformer circuit
The controller must have overload protection. The protection must
be ensured using components, such as:
• fuse, 5 mm x 20 mm, 1 Amp
• fuse, FNQ-R 0.5 Amp.
See the maximum fuse size for this specific product on the product
nameplate.
Related information
4.6.1 Nameplate
2.3.3 Motor overload protection
For installation of the motor overload protection, follow the
manufacturer's installation manual.
2.3.4 Connecting the multi-voltage primary transformer
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product.
208, 230, and 460-voltage variants require connecting the
power supply to the correct voltage terminal on the
primary transformer.
H1
X1
X2
115V
460V 230V 208V
0V
H2 H3 H4
TM075087
Primary transformer terminals
1. Determine the incoming power voltage.
2. Adjust the transformer to the desired voltage:
• 460 V - Connect power supply line 2 (L2) to H1, 460 V
• 230 V - Connect power supply line 2 (L2) to H2, 230 V
• 208 V - Connect power supply line 2 (L2) to H3, 208 V
3. Ensure that power supply line 3 (L3) is connected to H4, 0 V.
2.3.5 Connecting the pump supply and power supply
DANGER
Electric shock
Death or serious personal injury
‐If national legislation requires a Residual-Current
Device (RCD), or equivalent, in the electrical
installation, this must be of at least type A due to the
nature of the constant DC leakage current.
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 indicate where the main switch is
located by placing a label, or similar, in the control unit.
‐Make sure that the voltage between the phase and
neutral does not exceed 277 VAC.
‐Electrical connections must be implemented according
to the wiring diagrams.
Cable glands and plugs should be mounted only after the
installation is completed. Make sure gaskets are put on the cable
glands before the control unit is mounted on the wall.
Do not add components apart from those illustrated on the wiring
diagram. Unused neutral pin holes must not be used for other
connections.
For the US market only, use flexible metal conduits (FMC)
only.
Do not connect the phase inputs to the IO 242 module if
the input is higher than 3 x 480 VAC.
The residual-current circuit indicator must be marked as follows:
TM072098
Take into account the total leakage current of all the electrical
equipment in the installation
1. Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
2. Cut the power supply and pump supply cables as short as
possible.
3. Before switching the power on, check all voltages with a
multimeter and ensure that the voltage between neutral and
each phase does not exceed 277 VAC.
8
English (US)

4. Connect the power cables and pump cables according to the
relevant electrical diagram, including the cables from the motor
temperature and moisture sensor, if any. Tighten the terminal
screws to the correct torque as indicated in the table below.
Note that all wires must be secured inside the cabinet
using cable ties. To ensure correct IP protection level,
all cable glands must be mounted and plugged even
if they are not in use.
Remember to remove the jumper from the PTC
terminal if you are connecting cables from the
temperature and/or moisture sensor to the PTC
terminal.
Route the wires through the left side of the cable tray.
Terminal block Torque [lb-ft (Nm)]
Pump contactor 0.89 - 1.1 (1.2 - 1.5)
Power supply 0.89 - 1.1 (1.2 - 1.5)
Connecting a wire to a terminal with spring clamps
TM070570
Related information
6.16.1 Thermal protection
8.2 Code 2 (Power phase missing)
8.4 Code 9 (Power phase sequence wrong)
2.3.6 Connecting a level sensor
You can either connect an analog level sensor, such as a pressure
sensor, or a digital level sensor, such as a float switch.
1. Route the wires through one of the cable glands and the cable
tray.
2. Depending on the type of cable, take one of the following
actions:
• For low-voltage cables, route the wires through the right side
of the cable tray.
• For low-voltage cables that in the event of a short circuit can
obtain high-voltage potential, route the wires through the left
side of the cable tray.
3. Depending on the type and function of the sensor, connect the
wires to the following terminals:
Sensor type Sensor function Terminals
Analog All levels ADI - GND - 24 V
Digital
Dry-running level DI1 - GND
Stop level DI2 - GND
Start level, pump 1 DI3 - GND
Start level, pump 2 DI4 - GND
High level ADI - GND
1DI4 is not configured when S-2 designation is selected.
Related information
3.6 Configuring the input and output terminals using Grundfos GO
Remote
2.3.7 Connecting an alarm device
You can connect an alarm device, such as a buzzer or a lamp, to
the output relays Alarm 1 and Alarm 2. The control unit triggers the
alarm device when it detects an alarm or a warning. You can
change the behavior of the outputs with Grundfos GO Remote
under Relay output 1 and Relay output 2.
Default settings of the terminal blocks
Terminal block Default function
Alarm 1 All alarms
Alarm 2 High level
1. Route the wires through one of the cable glands and the cable
tray.
2. Depending on the type of wire, perform one of the following
actions:
• For low-voltage cables, route the wires through the right side
of the cable tray.
• For low-voltage cables that in the event of a short circuit can
obtain high-voltage potential, route the wires through the left
side of the cable tray.
3. Depending on the type of alarm device, connect the wires to
the relevant terminals. Note that all wires must be secured
inside the cabinet using cable ties.
•NO (Normally Open) and C (Common)
•NC (Normally Closed) and C (Common).
4. Tie the wires with cable ties.
DI 4 GND GND GND DI 3 DI 2
GND
ADI
24 V
EXT
Max. 2A Max. 2A
REL 4C REL 3C REL 4O REL 3O REL 3 REL 4
TM071997
9
English (US)

3. Starting up the product
3.1 Connecting to Grundfos GO Remote
Before connecting the product to Grundfos GO Remote, the
Grundfos GO Remote app must be downloaded to your smartphone
or tablet. The app is free of charge and available for iOS and
Android devices.
1. Open Grundfos GO Remote on your device. Make sure that
Bluetooth is enabled.
Your device must be within reach of the product to establish
Bluetooth connection.
2. Press the Bluetooth CONNECT button on Grundfos GO
Remote.
3. Press the connect button on the operating panel. The blue LED
above the connect button is flashing until your device is
connected. Once the connection is established, the LED will be
permanently on.
Grundfos GO Remote is now loading the data for the product.
Related information
3.4 How to enable Bluetooth on the operating panel
3.5 How to disable Bluetooth on the operating panel
3.2 Startup wizard on Grundfos GO Remote
The product is designed for Bluetooth communication with Grundfos
GO Remote.
Once you have connected your product to Grundfos GO Remote, a
startup wizard appears. Follow the instructions to make your
settings.
Grundfos GO Remote enables you to set functions and gives you
access to status overviews, technical product information and
current operating parameters.
3.3 Startup wizard on the operating panel
The first time the control unit is switched on, a startup wizard will
guide you through the basic settings. You can select the sensor
type and sensor levels. For some products, you can also set the
nominal pump current and number of phases.
If you have an analog sensor, select S-1 and set the height of the
different liquid levels, from low level to high level.
If you have a digital sensor, select S-2 and enable or disable the
dry-running level, the start level for pump 2, if available, and the
high level.
To change settings, use the Up or Down button on the operating
panel.
Use the OK button to confirm each setting and navigate to the next
setting.
For filling applications, you must use Grundfos GO
Remote.
Units can only be changed with Grundfos GO Remote.
Designation Description
S-1 Analog sensor, i.e. submersible pressure
transducer
S-2 Digital sensor, i.e. ball float
Related information
6.1 Setting the application type with Grundfos GO Remote
6.23 Starting the startup wizard with the operating panel
3.4 How to enable Bluetooth on the operating panel
If the Bluetooth signal on the operating panel has been disabled for
some reason, you are not able to connect with Grundfos GO
Remote. You must enable Bluetooth first.
1. Press and hold the connect button on the operating panel for
15 seconds. Wait for the blue LED to light up.
2. Press the Bluetooth CONNECT button on Grundfos GO
Remote.
3. Press the connect button on the operating panel. The blue LED
above the connect button is flashing blue until your device is
connected.
Grundfos GO Remote is now loading the data for the product.
Related information
3.1 Connecting to Grundfos GO Remote
3.5 How to disable Bluetooth on the operating panel
In some installation areas, it is not allowed to have a Bluetooth
signal enabled during operation. After installation, the Bluetooth
signal must be disabled manually.
1. Press and hold the connect button on the operating panel for
15 seconds. Wait for the blue LED to switch off.
Grundfos GO Remote is no longer connected to the product.
Related information
3.1 Connecting to Grundfos GO Remote
3.6 Configuring the input and output terminals using
Grundfos GO Remote
The control unit is equipped with configurable input and output (IO)
terminals. Using Grundfos GO Remote, you can configure the
terminals for different functions, depending on the device connected
to the terminals.
1. Go to SettingsIO 242.
2. Select the terminal you wish to configure, and follow on-screen
instructions.
You can find the names of the terminals inside the
control unit.
Related information
2.3.6 Connecting a level sensor
8.7 Code 25 (Wrong configuration)
8.15 Code 191 (High water level)
8.16 Code 205 (Level switch inconsistency)
9. Technical data
10
English (US)

3.7 Testing the product
When you have made all the electrical installations and completed
the startup wizard, you can test the system.
For emptying applications:
• Fill the pit with water, and check that the pump starts
automatically at the defined level.
• Test the dry-running protection by starting the pump manually,
and wait while the pit with the pump is emptied. Check if the
control unit activates an alarm and stops the pump when the
defined level is reached.
• Test the high-level by stopping the pump manually, then
continue to fill the pit with water. Check if the control unit starts
an alarm and stops the pump when the defined level is
reached. Set the pump to Auto, and observe that the pump
starts and stops when the stop level has been reached.
For filling applications:
• Start by draining the tank to be filled. When the tank is empty
and the start level is reached, the pump must start. When the
tank is full and the stop level is reached, the pump must stop.
• Test the high-level function by stopping the pump manually,
and continue to fill the tank without the pump with water. Check
if the control unit starts an alarm and stops the pump when the
defined level is reached.
• Test the dry-running protection by starting the pump manually,
and wait while the tank with the pump is emptied. Check if the
control unit starts an alarm and stops the pump when the
defined level is reached. If the pump is placed in a well, this
test may not be possible since the pump cannot empty the
well. Alternatively, pull the dry-run level switch to simulate a
dry-run situation. The same can be done with a submersible
pressure level sensor.
4. Product introduction
4.1 Product description
The level-control unit switches the pump on and off according to the
liquid level measured by float switches or a pressure sensor. When
the start level is reached, the pump starts, and when the liquid level
has been lowered to the stop level, the pump is stopped by the
control unit. An alarm is indicated in case of, for example, high-
water level in the tank or liquid level sensor failure.
Basic settings are configured via the operating panel, and advanced
settings are configured with Grundfos GO Remote. Furthermore,
you can read important operating parameters with Grundfos GO
Remote.
4.2 Intended use
The control unit is designed to control either one or two pumps
The product can be configured for two purposes: emptying a
wastewater pit or filling a pit or tank. The product can be used for
network pumping stations, main pumping stations, commercial
buildings and municipal systems.
If the product is used in an explosive environment, follow local
regulations. If required use additional equipment.
The product must not be exposed to strong solvents or oil
containing liquids.
4.3 Features
The control unit features among others the following functions:
• support of up to two pumps
• manual and automatic control of the pump
• Bluetooth pairing with Grundfos GO Remote
• operating indication, such as power on and pump running
• alarm and warning indication, such as power phase missing
and high-water level
• motor and phase failure protection
• setting of stop delays matching the actual operating conditions
• automatic alternation of pumps.
11
English (US)

4.4 Application types
You can choose between two application types:
•Empty
•Fill
You can set the application type with Grundfos GO Remote.
Empty
1
2
4
3
5
TM074545
1
2
4
3
TM074546
1
5
TM074547TM075061
1
5
4
3
TM074540
1
5
TM074541TM075059
Pos. Description
1High level
2Single pump: Not in use
Dual pump: Start level P2: start level for pump 2
3 Start level P1: start level for pump 1
4Stop level
5Dry-running level
The pump will start to empty the tank or pit when Start level P1 is
reached.
A second pump will start if the liquid level reaches Start level P2.
The pump stops when the liquid level is lowered to Stop level.
If the inflow of liquid exceeds the capacity of the installed pump, the
level in the tank or pit will rise. Eventually, the High level sensor will
register a high liquid level in the tank or pit. If set, the signal from
the High level sensor can be used to activate an output relay which
can then be used to activate a visual or acoustic alarm or send a
signal to a SCADA system.
If the pump is running, and the liquid level in the tank or pit falls
below the dry-running level, the dry-running protection will stop the
pump to ensure that it is not damaged mechanically.
12
English (US)

Fill
5
1
2
3
4
TM074548
4
1
2
3
TM074549
5
1
TM074550TM075062
5
1
2
3
TM074543
5
1
TM074544TM075060
Designation Description
1High level
2Stop level
3Start level P1: start level for pump 1
4Single pump: Not in use
Dual pump: Start level P2: start level for pump
5Dry-running level
In the filling application, the pump is installed in a tank or well from
where it pumps the liquid. The liquid is pumped into a second tank
where level sensors are installed.
The pump will start to fill the second tank when Start level P1 is
reached.
A second pump will start if the liquid level reaches Start level P2.
The pump stops when the liquid level reaches Stop level.
If, for any reason, the pump does not stop at Stop level and the
liquid level keeps rising, the High level sensor will eventually
register this. If set, the signal from the High level sensor can be
used to activate a relay output which can then be used to activate a
visual or acoustic alarm or send a signal to a SCADA system via a
communication interface.
If the pump is running, and the liquid level in the tank falls below the
dry-running level, the dry-running protection will stop the pump to
avoid any damage.
Related information
6.1 Setting the application type with Grundfos GO Remote
6.15.1 Automatic operation
13
English (US)

4.5 Terminals
26
27
28
29
30
31
32 7
6
8
9
10
11
12
23 2225 24 21 20 19 18 17 16 15 14 13
1
2 3 45
Max. 2A Max. 2A
24 V GND
REL 4C
GND DI 4 GND GND GND MPF2 MPF1 GND DI 3 DI 2 DI 1 GND 24 V
EXT
ADI
REL 3C PTC 2B PTC 2A PTC 1A REL 2 COM REL 1
L1 L2 L3 N
PTC 1B
CT 2B CT 2A CT 1A CT 1B
REL 4O
REL 3O REL 3 REL 4
GENI
480Y / 277V AC
IO 242
33
12
TM072017
Remember to separate potentially low-voltage cables from
potentially high-voltage cables when connecting them to
the control unit.
Pos. Description
1 Current transformer, pump 1.
2
Single pump: Not in use
Dual pump: Current
transformer, pump 2.
3 GENIbus
4 Termination resistor
5 Not for use
6 Supply voltage, 24 VDC
7User-configurable output relay
4, normally closed
8User-configurable output relay
4, common
9User-configurable output relay
4, normally open
10 User-configurable output relay
3, normally open
11 User-configurable output relay
3, common
12 User-configurable output relay
3, normally closed
13 Supply voltage for sensors, 24
VDC, max. 50 mA
14 Ground, GND
15 User-configurable analog or
digital input
16 Ground, GND
17 Digital input 4
Pos. Description
18 Ground, GND
19 Digital input 3
20 Ground, GND
21 Digital input 2
22 Ground, GND
23 Digital input 1
24 Motor-protection feedback
25 Phase monitoring
26 Temperature or moisture sensor
input, pump 1
27 Temperature or moisture sensor
input, pump 1
28
Single pump: Not in use
Dual pump: temperature or
moisture sensor input, pump 2
29
Single pump: Not in use
Dual pump: Temperature or
moisture sensor input, pump 2
30 Relay output, pump 1
31 Common
32
Single pump: Not in use
Dual pump: Relay output,
pump 2
33 Caution. Be careful when
installing these terminals.
14
English (US)

4.6 Identification
4.6.1 Nameplate
12 3 6
4
7
9
5
8
10 12
11
13
15
16
14
17
18
19 21 20 23
TM075056
Pos. Description
1 Product name
2Material number and Version
number
3 Supply voltage
4 Control power supply voltage
5 Production code, year and week
6 Serial number
7Minimum to maximum ambient
temperature
8 Short-circuit current rating [kA]
9 Maximum fuse size
10 Number of pumps
11 Largest pump FLA
12 Total FLA
13 Enclosure class
14 Options
15 IP Class
16 Weight
17 WEEE mark
18 Markings and approvals
19 Country of origin
20 Production site
21 Company address
22 Nameplate number
23 QR code
Related information
2.3.1 Protection of control panel
2.3.2 Protection of control power transformer circuit
4.6.2 Type key
Example LC
241 1x 1-5 DOL 30 150 3 x 208/230/460 PO OPT
Pos. 1 2 3 4 5 6 7 8 9
Pos. Description
1Type:
• LC 241: panel version
2 Number of pumps supported
3 Current range of pump(s) [A]
4Starting method:
• DOL: direct-on-line
5 Operating capacitor [µF]
6 Starting capacitor [µF]
7 Supply voltage [V]
8Panel type:
• PO: Thermoplastic enclosure
9
OPT: Options.
• A: Intrinsically safe, 2 digital, 1 analog
• B: Intrinsically safe, 4 digital
• C: Intrinsically safe, 5 digital, dual pump only
• E: Main disconnect switch
• G: Anti-condensation heater
• M: IO 241
• R: Elapsed time meter, single pump only
• S: Elapsed time meter, dual pump only
• T: Yeomans seal failure relay, single pump only
• W: Yeomans seal failure relay, dual pump only
• X: Lightning arrestor
• Y: 575 V phase monitor, Canada only
• ETO: 304 Stainless steel enclosure
4.7 Supported communication interface modules and
protocols
The following Grundfos communication interface modules can be
added to the product.
Communication interface module Protocol
CIM 050 GENIbus
CIM 150 PROFIBUS DP
CIM 200 Modbus RTU
CIM 500 Modbus TCP
PROFINET IO
15
English (US)

5. Control functions
5.1 Operating panel
7
6
8
8
9
11
10
13
14
15
12
5
4
3
2
1
TM070082
Dual pump unit
7
6
8
8
9
11
10
13
14
15
12
5
43
2
1
TM070191
Single pump unit
Pos. Symbol Description
1 Display
2
ft
m
Units
3 High level
4Single pump: Not in use
Dual pump: Start level, pump 2
5Single pump: Start level
Dual pump: Start level, pump 1
6Single pump: Stop level
Dual pump: Stop level, pump 1 and 2
7 Dry-running level
8
Up/Down buttons:
• Press these buttons to navigate between
submenus or change the value settings.
9
OK button:
• Press this button to save changed
values.
Pos. Symbol Description
10
Connect button:
• Press this button to connect the control
unit to Grundfos GO Remote via
Bluetooth.
11
Reset button:
• Press this button during startup to reset
settings and start over or to reset an
alarm or warning.
12
On Off Auto
Operating mode for the pump:
• On: The pump has been switched on
manually.
• Off: The pump has been switched off
manually.
• Auto: The pump is running automatically
based on settings.
13 Display The display shows the pump status.
14
Setpoint
5.00 bar
Operaring mode
Normal
Actual controlled value
4.90 bar
Control mode
Const. pressure
Status Settings Assist
1 2 3
56789
Lock symbol:
If the symbol is lit, the control unit is locked
from making changes.
15
Alarm and warning symbol:
Red: Alarm
Yellow: Warning
The control unit enables manual setting and monitoring of
the system.
16
English (US)

6. Setting the product
Make sure that all settings are entered according to the
pump and system requirements to avoid malfunction.
6.1 Setting the application type with Grundfos GO
Remote
1. Go to Settings > Level control > Application type.
2. Select the type.
•Empty
•Fill
Related information
3.3 Startup wizard on the operating panel
4.4 Application types
6.2 Setting the sensor type
6.2.1 Setting the sensor type with Grundfos GO Remote
1. Go to Settings > Level control > Sensor type.
2. Select the type.
•Analog sensors
•Digital sensors
6.2.2 Setting the sensor type with the operating panel
1. Press and hold OK until S-1 or S-2 starts flashing.
2. Select the sensor type using the Up and Down buttons.
•S-1: Analog sensors -
•S-2: Digital sensors -
3. Press OK to confirm the setting.
4. Continuously press OK to confirm all other settings and exit the
setup.
1Submersible pressure transducer
2Ball floats
6.3 Setting the start level
6.3.1 Setting the start level with Grundfos GO Remote
The settings apply to analog sensors. For digital sensors, the
setting is automatically activated.
1. Go to Settings > Level control > Start level P1.
2. Set the start level for pump 1.
3. Go to Settings > Level control > Start level P2.
4. Set the start level for pump 2.
6.3.2 Setting the start level with the operating panel
The settings apply to analog liquid level sensors. For digital
sensors, the setting is automatically activated.
1. Press and hold OK until the display and dry-running light start
flashing.
2. Continuously press OK until the indicator light for the start level
for pump 1 starts flashing.
TM071336TM072127
3. Set the start level for pump 1 by using
the Up and Down buttons.
4. Press OK.
The indicator light for the start level for pump 2 starts flashing.
TM071337
5. Set the start level for pump 2 by using
the Up and Down buttons.
6. Continuously press OK until the display stops flashing.
The settings have now been saved.
6.4 Setting the stop level
6.4.1 Setting the stop level with Grundfos GO Remote
The settings apply to analog liquid level sensors. For digital
sensors, the setting is automatically activated.
The stop level is the same for pump 1 and pump 2.
1. Go to Stop level> Settings > Level controlSettings
2. Set the stop level.
If you use the same level for start and stop,
remember to set a stop delay. This will prevent the
pump from starting and stopping too frequently.
6.4.2 Setting the stop level with the operating panel
The settings apply to analog liquid level sensors. For digital
sensors, the setting is automatically activated.
The stop level is the same for pump 1 and pump 2.
1. Press and hold OK until the display starts flashing.
17
English (US)

2. Press OK once.
The current stop level is indicated on the display.
3. Set the stop level using the Up and Down buttons.
4. Continuously press OK to confirm all other settings and to exit
the setup.
If you are using the same level for the start and stop
level, remember to set a stop delay. This will prevent
the pump from starting and stopping too frequently.
6.5 Setting the high level
6.5.1 Setting the high level with Grundfos GO Remote
For analog sensors - :
1. Go to Settings > Level control > High level
2. Set the high level.
For digital sensors - a :
1. Go to SettingsLC 231 IO terminals
2. Select which terminal to configure.
6.5.2 Setting the high level with the operating panel
The settings apply to analog sensors
1. Press and hold OK until the display starts flashing.
2. Press OK four times. The current high level is indicated on the
display.
3. Set the high level using the Up and Down button.
For digital sensors, enable or disable the setting.
1. Press OK once to complete the setting.
6.6 Stop delay
The stop delay is the time from when the stop level is reached until
the pump stops. The stop delay prevents the pump from starting
and stopping too frequently and reduces water hammer in long
pipes.
6.6.1 Setting the stop delay with Grundfos GO Remote
1. Select Settings > Level control > Stop delay > State
2. Select Stop delay time.
3. Set the Stop delay time.
6.7 Power-on delay
With this function it is possible to delay the startup of the pump after
the power supply has been switched on. The purpose is to avoid
disturbing the main power network which could happen if several
pumps start up immediately when the power supply is switched on.
6.7.1 Setting the power-on delay with Grundfos GO Remote
1. Go to Settings > Power-on delay.
2. Set the function to Enabled.
3. Set the time delay.
6.8 Dry-running protection
If the pump is running and the liquid level in the tank or pit becomes
lower than the dry-running level, the dry-running protection will stop
the pump to ensure that it is not damaged.
Dry-running protection is dependent on a feedback signal from a
level sensor installed in the tank or pit.
6.8.1 Setting the dry-running level with Grundfos GO Remote
1. Go to Settings > Level control > Dry-running level.
2. Set the dry-running level.
The dry-running level must be set to a value which
ensures that the pump is not damaged due to dry-
running. The specific level depends on the installed
pump type. See the installation and operating
instructions for the product.
6.8.2 Setting the dry-running level with the operating panel
1. Press and hold OK until the display starts flashing.
2. Set the dry-running level using the Up or Down button.
3. Continuously press OK to confirm all other settings and to exit
the setup.
6.9 Multipump settings
The control unit enables start and stop of the two pumps alternately.
The pump with the lowest number of running hours is always
started first. The function ensures that the running hours of the
pumps are the same.
It is possible to set a time delay before the next pump is started.
6.9.1 Setting the multipump settings with Grundfos GO Remote
1. Go to Settings > Multi pump settings
2. Set Inter pump delay.
This is the starting delay between the pumps ensuring that they
do not start at the same time.
3. Set Max number of running pumps.
This is the maximum number of pumps which are allowed to
run at the same time.
6.10 Using the same level switch for the start and stop
level
1. Set one digital input to Start pump 1 or Stop. All other digital
inputs must be disabled.
2. Set a stop delay.
This will prevent the pump from starting and stopping too
frequently.
6.11 Antiseizing
The Anti-seizing function prevents a pump from choking or seizing
up as a result of deposits buildup. Anti-seizing is used in pits that
have had no inlet flow for a long period. The Anti-seizing function
ensures that the pump starts as often as set in Anti-seizing > >
Interval. The pump will operate for the number of seconds
indicated by the user.
6.11.1 Setting the "Anti-seizing" function with Grundfos GO
Remote
1. Go to Settings > Anti-seizing.
2. Set the function to Enabled.
3. Set the time interval.
4. Set the operating time.
6.12 Signal-detection time
The signal-detection time is the minimum time a level has to be
active before the control unit initiates an action, such as starting or
stopping a pump.
6.12.1 Setting the signal-detection time with Grundfos GO
Remote
1. Go to Settings > Level control > Signal detection time.
2. Set the signal-detection time.
18
English (US)

6.13 Setting the maximum number of restarts with
Grundfos GO Remote
If the pump is seized up as a result of deposits buildup, it will be
stopped automatically due to overheating, provided that the motor
protection has been set. When the motor has cooled down, the
control unit will unsuccessfully try to restart the pump and this
scenario will be repeated.
In order to prevent this, it is possible to set a maximum number of
restart attempts within a set interval.
1. Go to Settings > Max number of restarts.
2. Enable the function.
3. Set the interval within which the allowed number of restarts are
to be counted.
4. Set the maximum number of pump restarts which are allowed
during the set interval.
Related information
6.16.1 Thermal protection
6.16.2 Overload protection
8.3 Code 4 (Too many motor restarts)
6.14 Setting the service interval with Grundfos GO
Remote
You can set a time in Grundfos GO Remote in order to get a
reminder that the pump needs service when the time comes.
1. Go to Settings > Service > State
2. Select Enable and press OK.
3. Select the pump.
4. Enter the number of hours until next service and press OK.
6.15 Operating the product
6.15.1 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
6.15.2 Manual operation
6.15.2.1 Starting and stopping the pump manually with
Grundfos GO Remote
1. Go to Settings > Control, pump 1.
2. Go to Settings > Control, pump 1 or Control, pump 2.
3. Start the pump by selecting On and pressing OK.
4. Stop the pump by selecting Off and pressing OK.
Related information
6.15.2.3 Choosing what the pump must do after manual start
6.15.2.2 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
6.15.2.3 Choosing what the pump must do after manual start
6.15.2.3 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
6.15.2.1 Starting and stopping the pump manually with Grundfos
GO Remote
6.15.2.2 Starting and stopping the pump manually with the
operating panel
6.16 Motor protection
Make sure that all settings are entered according to the
pump and system requirements to avoid malfunction.
6.16.1 Thermal 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 positive temperature coefficient (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
2.3.5 Connecting the pump supply and power supply
6.13 Setting the maximum number of restarts with Grundfos GO
Remote
8.10 Code 69 (Winding temperature too high)
19
English (US)

6.16.2 Overload protection
The pump is protected by a motor-protection relay. The nominal
current draw must be set manually on the motor-protection relay.
See the specific documentation for the relay on how to set the
trigger level. If the current exceeds the trigger level, the relay will
switch off the pump and the controller will give an alarm. The alarm
has to be manually reset directly on the motor protection relay.
Related information
6.13 Setting the maximum number of restarts with Grundfos GO
Remote
8.8 Code 48 (Motor is overloaded)
6.16.3 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.
6.17 Alarm reset
6.17.1 Resetting alarms and warnings manually with Grundfos
GO Remote
1. Go to Alarms and warnings.
2. Press Reset alarm.
All current alarms and warnings have been reset. However, if
the fault causing the alarm or warning has not been removed,
the alarm or warning will appear again.
3. If you want to delete all alarms and warnings from the history
log, press Show log > Reset alarm and warning logs.
6.17.2 Setting the automatic alarm reset with Grundfos GO
Remote
1. Go to Settings > Automatic alarm reset.
2. Select one of the following:
No automatic reset
The control unit does not
reset any alarm or warning.
You must do it manually.
All except pump critical
The control unit resets alarms
and warnings unless the
related fault can damage the
pump.
All alarms
The control unit resets alarms
and warnings, regardless of
the fault.
6.17.3 Resetting alarms and warnings on the operating panel
You can manually reset alarms and warnings on the operating
panel. However, if the fault causing the alarm or warning has not
been removed, the alarm or warning will appear again.
1. Press Reset on the operating panel to reset the alarm or
warning.
6.18 Setting the buzzer with Grundfos GO Remote
The internal buzzer is used to give an acoustic sound if there is a
warning or an alarm.
1. Go to Settings > Buzzer settings.
2. Select when the buzzer is to be activated:
•All alarms
•All alarms and warnings.
6.19 Setting units for Grundfos GO Remote
Changing units as described here will only change the units shown
in Grundfos GO Remote. It will not affect the units shown on the
operating panel of products connected to Grundfos GO Remote.
1. Press the Menu button in the upper left corner of Grundfos GO
Remote.
TM075196
2. Go to General > Settings > Products > Units.
3. Select US or Grundfos default units.
6.20 Setting units for the operating panel with Grundfos
GO Remote
Changing units as described below changes the units shown in the
operating panel of the product connected to Grundfos GO Remote.
It does not affect the units shown in Grundfos GO Remote.
1. Go to Settings > Display units.
2. Select the units to be used on the operating panel.
•SI Units
•US Units.
6.21 GENIbus
GENIbus, the Grundfos Electronics Network Intercommunications
bus, is a fieldbus developed by Grundfos to meet the need for data
transfer in all typical Grundfos motor or pump applications.
Grundfos devices with GENIbus can be wired together in networks
and integrated in automation systems. Each device on the network
must have a unique GENIbus address. GENIbus is based on the
RS485 hardware standard and typically operates at a baud rate of
9600 bits/s.
20
English (US)