Grundfos CUE User manual

CUE, 110-250 kW
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document
2. Introduction
This manual introduces all aspects of your Grundfos CUE
frequency converter in the power range of 110 to 250 kW.
Always keep this manual close to the CUE.
2.1 General description
CUE is a series of external frequency converters especially
designed for pumps.
Thanks to the startup guide in the CUE, the installer can quickly
set central parameters and put the CUE into operation.
Connected to a sensor or an external control signal, the CUE will
quickly adapt the pump speed to the actual demand.
2.2 Applications
The CUE series and Grundfos standard pumps are a supplement
to the Grundfos E-pumps range with integrated frequency
converter.
A CUE solution offers the same E-pump functionality in these
cases:
• in mains voltage or power ranges not covered by the E-pump
range
• in applications where an integrated frequency converter is not
desirable or permissible.
1. Symbols used in this document 2
2. Introduction 2
2.1 General description 2
2.2 Applications 2
2.3 References 3
3. Safety and warnings 3
3.1 Warning 3
3.2 Safety regulations 3
3.3 Installation requirements 3
3.4 Reduced performance under certain conditions 3
4. Identification 4
4.1 Nameplate 4
4.2 Packaging label 4
5. Mechanical installation 4
5.1 Receipt and storage 4
5.2 Transportation and unpacking 4
5.3 Space requirements and air circulation 5
5.4 Mounting 5
6. Electrical connection 7
6.1 Electrical protection 7
6.2 Mains and motor connection 7
6.3 Connecting the signal terminals 8
6.4 Connecting the signal relays 11
6.5 Connecting the MCB 114 sensor input module 11
6.6 EMC-correct installation 12
6.7 RFI filters 12
6.8 Output filters 13
7. Operating modes 14
8. Control modes 14
8.1 Uncontrolled operation (open loop) 14
8.2 Controlled operation (closed loop) 14
9. Menu overview 15
10. Setting by means of the control panel 17
10.1 Control panel 17
10.2 Back to factory settings 18
10.3 CUE settings 18
10.4 Startup guide 18
10.5 GENERAL 23
10.6 OPERATION 24
10.7 STATUS 25
10.8 INSTALLATION 27
11. Setting by means of PC Tool E-products 35
12. Priority of settings 35
12.1 Control without bus signal, local operating mode 35
12.2 Control with bus signal, remote-controlled operating
mode 35
13. External control signals 36
13.1 Digital inputs 36
13.2 External setpoint 36
13.3 GENIbus signal 37
13.4 Other bus standards 37
14. Maintenance and service 37
14.1 Cleaning the CUE 37
14.2 Service parts and service kits 37
15. Fault finding 37
15.1 Warning and alarm list 37
15.2 Resetting of alarms 38
15.3 Indicator lights 38
15.4 Signal relays 38
16. Technical data 39
16.1 Enclosure 39
16.2 Main dimensions and weights 39
16.3 Surroundings 40
16.4 Terminal torques 40
16.5 Cable length 40
16.6 Fuses and cable cross-section 40
16.7 Inputs and outputs 41
16.8 Sound pressure level 41
17. Disposal 41
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
If these safety instructions are not observed, it may
result in personal injury.
Caution
If these safety instructions are not observed, it may
result in malfunction or damage to the equipment.
Note
Notes or instructions that make the job easier and
ensure safe operation.
Caution
If the pump speed exceeds the rated speed, the
pump will be overloaded.

English (GB)
3
2.3 References
Technical documentation for Grundfos CUE:
• The manual contains all information required for putting the
CUE into operation.
• The data booklet contains all technical information about the
construction and applications of the CUE.
• The service instructions contain all required instructions for
dismantling and repairing the frequency converter.
Technical documentation is available on www.grundfos.com >
Grundfos Product Center.
If you have any questions, please contact the nearest Grundfos
company or service workshop.
3. Safety and warnings
3.1 Warning
Wait only for shorter time if stated so on the nameplate of the
CUE in question.
3.2 Safety regulations
• The on/off button of the control panel does not disconnect the
CUE from the power supply and must therefore not be used as
a safety switch.
• The CUE must be earthed correctly and protected against
indirect contact according to local regulations.
• The leakage current to earth exceeds 3.5 mA.
• Enclosure class IP20/21 must not be installed freely
accessible, but only in a panel.
• Enclosure class IP54/55 must not be installed outdoors
without additional protection against weather conditions and
the sun.
• Always observe local regulations as to cable cross-section,
short-circuit protection and overcurrent protection.
3.3 Installation requirements
The general safety necessitates special considerations as to
these aspects:
• fuses and switches for overcurrent and short-circuit protection
• selection of cables (mains current, motor, load distribution and
relay)
• net configuration (IT, TN, earthing)
• safety on connecting inputs and outputs (PELV).
3.3.1 IT mains
In connection with IT mains and earthed delta mains, the mains
voltage may exceed 440 V between phase and earth.
3.3.2 Aggressive environment
The CUE contains a large number of mechanical and electronic
components. They are all vulnerable to environmental impact.
3.4 Reduced performance under certain conditions
The CUE will reduce its performance under these conditions:
• low air pressure (at high altitude)
• long motor cables.
The required measures are described in the next two sections.
3.4.1 Reduction at low air pressure
PELV = Protective Extra Low Voltage.
At low air pressure, the cooling capacity of air is reduced, and the
CUE automatically reduces the performance to prevent overload.
It may be necessary to select a CUE with a higher performance.
3.4.2 Reduction in connection with long motor cables
The maximum cable length for the CUE is 300 m for unscreened
and 80 m for screened cables. In case of longer cables, contact
Grundfos.
The CUE is designed for a motor cable with a maximum cross-
section as stated in section 16.6 Fuses and cable cross-section.
Warning
Any installation, maintenance and inspection must be
carried out by trained personnel.
Warning
Touching the electrical parts may be fatal, even after
the CUE has been switched off.
Before performing any work on the CUE, the mains
supply and other input voltages must be switched off
for a minimum time of 20 minutes.
Warning
Do not connect 380-500 V CUE frequency converters
to mains supplies with a voltage between phase and
earth of more than 440 V.
Caution
The CUE should not be installed in an environment
where the air contains liquids, particles or gases
which may affect and damage the electronic
components.
Warning
At altitudes above 2000 m, the PELV requirements
cannot be met.

English (GB)
4
4. Identification
4.1 Nameplate
The CUE can be identified by means of the nameplate. An
example is shown below.
Fig. 1 Example of nameplate
4.2 Packaging label
The CUE can also be identified by means of the label on the
packaging.
5. Mechanical installation
The individual CUE cabinet sizes are characterised by their
enclosures. The table in section 16.1 Enclosure shows the
relationship between enclosure class and enclosure type.
5.1 Receipt and storage
Check on receipt that the packaging is intact, and the unit is
complete. In case of damage during transport, contact the
transport company to complain.
Note that the CUE is delivered in packaging which is not suitable
for outdoor storage.
5.2 Transportation and unpacking
To prevent damage during the transport to the site, the CUE must
only be unpacked at the installation site.
Remove the cardboard box, and keep the CUE on the pallet for
as long as possible.
The packaging contains accessory bag(s), documentation and
the unit itself.
5.2.1 Lifting the CUE
Always lift the CUE using the lifting holes. Use a bar to avoid
bending the lifting holes. See fig. 2.
Fig. 2 Recommended lifting method
TM04 3272 4808
Text Description
T/C: CUE (product name)
202P1M2... (internal code)
Prod. no: Product number: 12345678
S/N:
Serial number: 123456G234
The last three digits indicate the production
date: 23 is the week, and 4 is the year 2004.
1.5 kW Typical shaft power on the motor
IN: Supply voltage, frequency and maximum input
current
OUT:
Motor voltage, frequency and maximum output
current. The maximum output frequency
usually depends on the pump type.
CHASSIS/IP20 Enclosure class
Tamb. Maximum ambient temperature
T/C: CUE202P1M2T5E20H1BXCXXXSXXXXAXBXCXXXXDX
Prod. no: 12345678 S
/
N: 123456G234
IN: 3x380-500 V 50/60Hz 3.7A
OUT: 3x0-Vin 0-100Hz 4.1 A 2.8 kV
A
CHASSIS/IP20 Tamb. 45C/122F
IIIIIIIIIIIBAR CODEIIIIIIIIIII MADE IN DENMARK
Listed 76X1 E134261 Ind. Contr. Eq.
See manual for prefuse
CAUTION:
SEE MANUAL
/
VOIR MANUEL
WARNING:
STORED CHARGE DO NOT TOUCH UNTIL
4 MIN AFTER DISCONNECTION
CHARGE RESIDUELLE, ATTENDRE
4 MIN APRES DECONNEXION
1.5 kW (400V)
TM03 9896 4607

English (GB)
5
5.3 Space requirements and air circulation
CUE units can be mounted side by side, but as a sufficient air
circulation is required for cooling, these requirements must be
met:
• Sufficient free space above and below the CUE to allow airflow
and cable connection. See fig. 3.
• Ambient temperature up to 45 °C.
Fig. 3 Airflow direction and required space for cooling [mm]
Furthermore, there must be sufficient space in front of the CUE
for opening the door of the CUE. See fig. 4.
Fig. 4 Free space in front of the CUE [mm]
5.4 Mounting
5.4.1 Mounting on the wall
1. Mark the mounting holes on the wall using the drilling
template. See fig. 5.
2. Drill the holes. See fig. 5.
3. Fit the screws at the bottom, but leave loose. Lift the CUE up
on the screws. Move the CUE against the wall, and fit the
screws at the top. Tighten all four screws. See fig. 2.
Fig. 5 Drilling of holes in the wall
TM03 9898 4607TM05 9324 3713
Min. 225
Min. 225
Caution
The user is responsible for mounting the CUE
securely on a firm surface.
Note
See the main dimensions and weights in section
16.2 Main dimensions and weights.
TM03 8860 2607
b
a
a
b

English (GB)
6
5.4.2 Mounting on the floor
By means of a pedestal (option), the CUE can also be mounted
on the floor.
1. Mark the mounting holes on the floor. See fig. 6.
2. Drill the holes.
3. Mount the pedestal on the floor.
4. Mount the CUE on the pedestal using the enclosed screws.
See fig. 7.
Fig. 6 Drilling template for pedestal
Fig. 7 CUE on a pedestal
Warning
The CUE is top-heavy and may fall over if the
pedestal is not anchored to the floor.
Caution
The user is responsible for mounting the CUE
securely on a firm surface.
Note
See the pedestal kit instructions for further
information.
TM05 9669 4313
Pos. D1h
[mm] D2h [mm]
1 400 400
2 325 420
3 283.8 378.8
4 240 240
5 4 x 14 4 x 14
6 217 317
5
6
3
1
2
4
TM03 9895 4607

English (GB)
7
6. Electrical connection
Fig. 8 Example of three-phase mains connection of the CUE
with mains switch, backup fuses and additional
protection
6.1 Electrical protection
6.1.1 Protection against electric shock, indirect contact
Protective conductors must always have a yellow/green (PE) or
yellow/green/blue (PEN) colour marking.
Instructions according to EN IEC 61800-5-1:
• The CUE must be stationary, installed permanently and
connected permanently to the mains supply.
• The earth connection must be carried out with duplicate
protective conductors.
6.1.2 Protection against short-circuit, fuses
The CUE and the supply system must be protected against short-
circuit.
Grundfos demands that the backup fuses mentioned in section
16.6 Fuses and cable cross-section are used for protection
against short-circuit.
The CUE offers complete short-circuit protection in case of a
short-circuit on the motor output.
6.1.3 Additional protection
If the CUE is connected to an electrical installation where an
earth leakage circuit breaker (ELCB) is used as additional
protection, the circuit breaker must be of a type marked with the
following symbols:
The circuit breaker is type B.
The total leakage current of all the electrical equipment in the
installation must be taken into account.
The leakage current of the CUE in normal operation can be seen
in section 16.7.1 Mains supply (L1, L2, L3).
During startup and in asymmetrical supply systems, the leakage
current can be higher than normal and may cause the ELCB to
trip.
6.1.4 Motor protection
The motor requires no external motor protection. The CUE
protects the motor against thermal overloading and blocking.
6.1.5 Protection against overcurrent
The CUE has an internal overcurrent protection for overload
protection on the motor output.
6.1.6 Protection against mains voltage transients
The CUE is protected against mains voltage transients according
to EN 61800-3, second environment.
6.2 Mains and motor connection
The supply voltage and frequency are marked on the CUE
nameplate. Make sure that the CUE is suitable for the power
supply of the installation site.
6.2.1 Mains switch
A mains switch can be installed before the CUE according to local
regulations. See fig. 8.
Warning
The owner or installer is responsible for ensuring
correct earthing and protection according to local
standards.
Warning
Before making any work on the CUE, the mains
supply and other voltage inputs must be switched off
for at least as long as stated in section 3. Safety and
warnings.
TM03 8525 1807
Warning
The CUE must be earthed correctly and protected
against indirect contact according to local
regulations.
Caution
The leakage current to earth exceeds 3.5 mA, and a
reinforced earth connection is required.
ELCB
Caution
The leakage current to earth exceeds 3.5 mA.
ELCB

English (GB)
8
6.2.2 Wiring diagram
The wires in the terminal box must be as short as possible.
Excepted from this is the earth conductor which must be so long
that it is the last one to be disconnected in case the cable is
inadvertently pulled out of the cable entry.
Fig. 9 Wiring diagram, three-phase mains connection
6.2.3 Gland plate
Cables are connected through the gland plate from the bottom.
The gland plate must be fitted to the CUE to ensure the specified
protection degree as well as to ensure sufficient cooling.
Drill holes in the marked areas. See fig. 10.
Fig. 10 CUE viewed from the bottom [mm]
6.2.4 Motor connection
For information about enclosures, see table in section
16.1 Enclosure.
1. Connect the earth conductor to terminal 99 (PE). See fig. 11.
2. Connect the motor conductors to terminals 96 (U), 97 (V), 98
(W).
3. Fix the screened cable with a cable clamp.
6.2.5 Mains connection
1. Connect the earth conductor to terminal 95 (PE). See fig. 11.
2. Connect the mains conductors to terminals 91 (L1), 92 (L2),
93 (L3).
3. Fix the mains cable with a cable clamp.
6.2.6 Terminal location
Take the following terminal positions into consideration when you
design the cable connection. See fig. 11.
Fig. 11 Earth, mains and motor connection
6.3 Connecting the signal terminals
Connect the signal cables according to the guidelines for good
practice to ensure EMC-correct installation. See section
6.6 EMC-correct installation.
• Use screened signal cables with a conductor cross-section of
min. 0.5 mm2and max. 1.5 mm2.
• Use a 3-conductor screened bus cable in new systems.
6.3.1 Minimum connection, signal terminal
Operation is only possible when terminals 18 and 20 are
connected, for instance by means of an external on/off switch or a
short wire.
Fig. 12 Required minimum connection, signal terminal
TM03 8799 2507
Terminal Function
91 (L1)
Three-phase supply92 (L2)
93 (L3)
95/99 (PE) Earth connection
96 (U) Three-phase motor connection, 0-100 % of
mains voltage
97 (V)
98 (W)
TM05 9326 3713
Caution
The motor cable must be screened for the CUE to
meet EMC requirements.
Caution
Check that the mains voltage and frequency
correspond to the values on the nameplate of the
CUE and the motor.
TM05 9329 3713
Caution
As a precaution, signal cables must be separated
from other groups by reinforced insulation in their
entire lengths.
Note
If no external on/off switch is connected, short-circuit
terminals 18 and 20 using a short wire.
TM03 9057 3207
Start/stop
GND

English (GB)
9
6.3.2 Wiring diagram, signal terminals
Terminals 27 and 29 are not used.
TM05 806 2811
TM05 808 2811
GND
RS-485 B
RS/485 A
RS-485 GND Y
AO 1
+10 V out
AI 1 AI 2
GND
+24 V out +24 V out DI 1 DI 2 DI 3 DI 4 GND
External setpoint,
voltage input
0-10 V Terminals
U: 0-10 V
I: 0/4-20 mA
GND
AO 1
+10 V out
AI 1
AI
RS-485 GND Y
RS-485 A RS-485 B
+24 V out +24 V out DI 1 DI 2 DI 3 DI 4 GND
GND
Two-wire sensor 0/4-20 mA Terminals
U: 0-10 V
I: 0/4-20 mA
TM05 808 2811
TM05 805 2811
GND
AO 1
+10 V out
AI 1 AI 2
RS-485 GND Y
RS-485 A RS-485 B
+24 V out +24 V out DI 1 DI 2 DI 3 DI 4 GND
GND
External setpoint,
current input
0/4-20 mA Terminals
U: 0-10 V
I: 0/4-20 mA
GND
AO 1
+10 V out
AI 1 AI 2
RS-485 GND Y
RS-485 A
RS-485 B
GND DI 4 DI 3 DI 2 DI 1
+24 V out
+24 V out
GND
Three-wire sensor
0/4-20 mA Terminals
U: 0-10 V
I: 0/4-20 mA
Terminal Type Function Terminal Type Function
12 +24 V out Supply to sensor 42 AO 1 Analog output, 0-20 mA
13 +24 V out Additional supply 50 +10 V out Supply to potentiometer
18 DI 1 Digital input, start/stop 53 AI 1 External setpoint, 0-10 V, 0/4-20 mA
19 DI 2 Digital input, programmable 54 AI 2 Sensor input, sensor 1, 0/4-20 mA
20 GND Common frame for digital inputs 55 GND Common frame for analog inputs
32 DI 3 Digital input, programmable 61 RS-485 GND Y GENIbus, frame
33 DI 4 Digital input, programmable 68 RS-485 A GENIbus, signal A (+)
39 GND Frame for analog output 69 RS-485 B GENIbus, signal B (-)
Note
The RS-485 screen must be connected to frame.

English (GB)
10
6.3.3 Connection of a thermistor (PTC) to the CUE
The connection of a thermistor (PTC) in a motor to the CUE
requires an external PTC relay.
The requirement is based on the fact that the thermistor in the
motor only has one layer of insulation to the windings. The
terminals in the CUE require two layers of insulation since they
are part of a PELV circuit.
A PELV circuit provides protection against electric shock. Special
connection requirements apply to this type of circuit. The
requirements are described in EN 61800-5-1.
In order to maintain PELV, all connections made to the control
terminals must be PELV. For example, the thermistor must have
reinforced or double insulation.
6.3.4 Access to signal terminals
All terminals for signal cables are located beneath the control
panel and can be accessed by opening the door of the CUE. See
fig. 13.
Fig. 13 Signal cable routing
6.3.5 Fitting the conductor
1. Remove the insulation at a length of 9 to 10 mm.
2. Insert a screwdriver with a tip of maximum 0.4 x 2.5 mm into
the square hole.
3. Insert the conductor into the corresponding round hole.
Remove the screwdriver. The conductor is now fixed in the
terminal.
Fig. 14 Fitting the conductor into the signal terminal
6.3.6 Setting the analog inputs, terminals 53 and 54
Contacts A53 and A54 are positioned behind the control panel
and used for setting the signal type of the two analog inputs.
The factory setting of the inputs is voltage signal "U".
Remove the control panel to set the contact. See fig. 15.
Fig. 15 Setting contact A54 to current signal "I"
TM05 9654 4213
TM03 9026 2807
Note
If a 0/4-20 mA sensor is connected to terminal 54,
the input must be set to current signal "I".
Switch off the power supply before setting contact
A54.
TM03 9104 3407
UI
A53
UI
A54

English (GB)
11
6.3.7 RS-485 GENIbus network connection
One or more CUE units can be connected to a control unit via
GENIbus. See the example in fig. 16.
Fig. 16 Example of an RS-485 GENIbus network
The reference potential, GND, for RS-485 (Y) communication
must be connected to terminal 61.
If more than one CUE unit is connected to a GENIbus network,
the termination contact of the last CUE must be set to "ON"
(termination of the RS-485 port).
The factory setting of the termination contact is "OFF" (not
terminated).
Remove the control panel to set the contact. See fig. 17.
Fig. 17 Setting the termination contact to "ON"
6.4 Connecting the signal relays
Fig. 18 Terminals for signal relays in normal state (not
activated)
6.5 Connecting the MCB 114 sensor input module
The MCB 114 is an option offering additional analog inputs for the
CUE.
6.5.1 Configuration of the MCB 114
The MCB 114 is equipped with three analog inputs for these
sensors:
• One additional sensor 0/4-20 mA. See section 10.8.14 Sensor
2 (3.16).
• Two Pt100/Pt1000 temperature sensors for measurement of
motor bearing temperature or an alternative temperature, such
as liquid temperature. See sections 10.8.19 Temperature
sensor 1 (3.21) and 10.8.20 Temperature sensor 2 (3.22).
When the MCB 114 has been installed, the CUE will automatically
detect if the sensor is Pt100 or Pt1000 when it is switched on.
6.5.2 Wiring diagram, MCB 114
Fig. 19 Wiring diagram, MCB 114
Terminals 10, 11 and 12 are not used.
TM03 9005 2807TM03 9006 2807
Caution
As a precaution, signal cables must be separated
from other groups by reinforced insulation in their
entire lengths.
TM03 8801 2507
Terminal Function
C 1 C 2 Common
NO 1 NO 2 Normally open contact
NC 1 NC 2 Normally closed contact
Bus Ter = ON
OFF ON
BUS TER
C 1
NC 1
NO 1
NC 2
NO 2
C2
TM04 3273 3908
Terminal Type Function
1 (VDO) +24 V out Supply to sensor
2 (I IN) AI 3 Sensor 2, 0/4-20 mA
3 (GND) GND Common frame for analog input
4 (TEMP)
5 (WIRE) AI 4 Temperature sensor 1, Pt100/Pt1000
6 (GND) GND Common frame for temperature sensor 1
7 (TEMP)
8 (WIRE) AI 5 Temperature sensor 2, Pt100/Pt1000
9 (GND) GND Common frame for temperature sensor 2
1 98765432 1
2
1
1
1
0
VDO
I IN
GND
TEMP
WIRE
GND
TEMP
WIRE
GND
+
-
+

English (GB)
12
6.6 EMC-correct installation
This section provides guidelines for good practice when installing
the CUE. Follow these guidelines to meet EN 61800-3, first
environment.
• Use only motor and signal cables with a braided metal screen
in applications without output filter.
• There are no special requirements to supply cables, apart
from local requirements.
• Leave the screen as close to the connecting terminals as
possible. See fig. 20.
• Avoid terminating the screen by twisting the ends. See fig. 21.
Use cable clamps or EMC screwed cable entries instead.
• Connect the screen to frame at both ends for both motor and
signal cables. See fig. 22. If the controller has no cable
clamps, connect only the screen to the CUE. See fig. 23.
• Avoid unscreened motor and signal cables in electrical
cabinets with frequency converters.
• Make the motor cable as short as possible in applications
without output filter to limit the noise level and minimise
leakage currents.
• Screws for frame connections must always be tightened
whether a cable is connected or not.
• Keep main cables, motor cables and signal cables separated
in the installation, if possible.
Other installation methods may give similar EMC results if the
above guidelines for good practice are followed.
Fig. 20 Example of stripped cable with screen
Fig. 21 Do not twist the screen ends
Fig. 22 Example of connection of a 3-conductor bus cable with
screen connected at both ends
Fig. 23 Example of connection of a 3-conductor bus cable with
screen connected at the CUE (controller with no cable
clamps)
6.7 RFI filters
To meet the EMC requirements, the CUE comes with the
following types of built-in radio frequency interference filter (RFI).
Description of RFI filter types
RFI filter types are according to EN 61800-3.
6.7.1 Equipment of category C3
• This type of power drive system (PDS) is not intended to be
used on a low-voltage public network which supplies domestic
premises.
• Radio frequency interference is expected if used on such a
network.
TM02 1325 0901TM03 8812 2507
TM03 8732 2407TM03 8731 2407
Voltage
[V] Typical shaft power P2 [kW] RFI filter type
3 x 380-500 110-250 C3
3 x 525-690 110-250 C3
C3: For use in industrial areas with own low-voltage
transformer.
CUEController
CUEController

English (GB)
13
6.8 Output filters
Output filters are used for reducing the voltage stress on the
motor windings and the stress on the motor insulation system as
well as for decreasing acoustic noise from the frequency
converter-driven motor.
Two types of output filter are available as accessories for the
CUE:
•dU/dtfilters
• sine-wave filters.
Use of output filters
The table below explains in which cases an output filter is
required. From the table it can be seen if a filter is needed, and
which type to use.
The selection depends on:
• pump type
• motor cable length
• the required reduction of the acoustic noise from the motor.
The lengths stated apply to the motor cable.
Motor cable
Fig. 24 Example of installation without filter
Fig. 25 Example of installation with filter. The cable between
the CUE and filter must be short
Fig. 26 Submersible pump without connection box. Frequency
converter and filter installed close to the well
Fig. 27 Submersible pump with connection box and screened
cable. Frequency converter and filter installed far away
from the well and connection box installed close to the
well
Pump type CUE output power dU/dt filter Sine-wave filter
SP, BM, BMB with motor voltage from 380 V and higher All NA 0-300 m
Pumps with MG71 and MG80 up to 1.5 kW < 1.5 kW NA 0-300 m
Reduction of dU/dt, reduced noise emission (Low reduction) All 0-150 m NA
Reduction of dU/dt, Upeak and reduced noice emission (High reduction) All NA 0-300 m
With motors rated 500 V or higher All NA 0-300 m
Note
To meet EN 61800-3, the motor cable must always
be a screened cable, whether an output filter is
installed or not.
The mains cable need not be a screened cable. See
figures 24, 25, 26 and 27.
TM04 4289 1109TM04 4290 1109TM04 4291 1109TM04 4292 1109
Symbol Designation
1 CUE
2Filter
3 Connection box
4 Standard motor
5 Submersible motor
One line Unscreened cable
Double line Screened cable
14
124
125
1 32 5

English (GB)
14
7. Operating modes
The following operating modes are set on the control panel in the
"OPERATION" menu, display 1.2. See section 10.6.2 Operating
mode (1.2).
Example: Max. curve operation can for instance be used in
connection with venting the pump during installation.
Example: Min. curve operation can for instance be used in
periods with a very small flow requirement.
8. Control modes
The control mode is set on the control panel in the
"INSTALLATION" menu, display 3.1. See section 10.8.1 Control
mode (3.1).
There are two basic control modes:
• Uncontrolled operation (open loop).
• Controlled operation (closed loop) with a sensor connected.
See sections 8.1 Uncontrolled operation (open loop) and
8.2 Controlled operation (closed loop).
8.1 Uncontrolled operation (open loop)
Example: Operation on constant curve can for instance be used
for pumps with no sensor connected.
Example: Typically used in connection with an overall control
system such as the MPC or another external controller.
8.2 Controlled operation (closed loop)
Operating mode Description
Normal The pump is running in the control mode
selected
Stop The pump has been stopped (green indicator
light is flashing)
Min. The pump is running at minimum speed
Max. The pump is running at maximum speed
TM03 8813 2507
Min. and max. curves.
The pump speed is kept at a given
set value for minimum and maximum
speed, respectively.
TM03 8479 1607
Constant curve.
The speed is kept at a set value in
the range between the min. and max.
curves.
The setpoint is set in %
corresponding to the required speed.
Min.
Max.
TM03 8475 1607 TM03 8804 2507
Proportional
differential
pressure.
The differential
pressure is reduced
at falling flow rate
and increased at
rising flow rate.
TM03 8476 1607 TM03 8804 2507
Constant
differential
pressure, pump.
The differential
pressure is kept
constant,
independently of
the flow rate.
TM03 8476 1607 TM03 8806 2507
Constant
differential
pressure, system.
The differential
pressure is kept
constant,
independently of
the flow rate.
TM03 8476 1607 TM03 8805 2507
Constant pressure.
The pressure is
kept constant,
independently of
the flow rate.
TM03 8477 1607 TM03 8807 2507
Constant pressure
with stop function.
The outlet pressure
is kept constant at
high flow rate.
On/off operation at
low flow rate.
TM03 8482 1607 TM03 8808 2607
Constant level.
The liquid level is
kept constant,
independently of
the flow rate.
TM03 8482 1607 TM03 8809 2607
Constant level with
stop function.
The liquid level is
kept constant at
high flow rate.
On/off operation at
low flow rate.
TM03 8478 1607 TM03 8810 2507
Constant flow rate.
The flow rate is
kept constant,
independently of
the head.
TM03 8482 1607 TM03 8811 2507
Constant
temperature.
The liquid
temperature is kept
constant,
independently of
the flow rate.
CUE
Δp
CUE
Δp
CUE
Δp
CUE
p
CUE
p
CUE
L
CUE
L
CUE
Q
CUE
t

English (GB)
15
9. Menu overview
Fig. 28 Menu overview
Menu structure
The CUE has a startup guide, which is started at the first startup.
After the startup guide, the CUE has a menu structure divided
into four main menus:
1. "GENERAL" gives access to the startup guide for the general
setting of the CUE.
2. "OPERATION" enables the setting of setpoint, selection of
operating mode and resetting of alarms. It is also possible to
see the latest five warnings and alarms.
3. "STATUS" shows the status of the CUE and the pump. It is not
possible to change or set values.
4. "INSTALLATION" gives access to all parameters. Here a
detailed setting of the CUE can be made.
STARTUP GUIDE 0. GENERAL 1. OPERATION
0.1 1.1
1/16 0.2 1.2
2/16 0.24 1.3
3/16 8/16 1.4
4/16 9/16 1.5 - 1.9
5/16 10/16 - 14/16
6/16 8/16 1.10 - 1.14
7/16 16/16
Automatic or manual
setting of the direction
of rotation

English (GB)
16
2. STATUS 3. INSTALLATION
2.1 2.10 3.1 3.12 3.24
2.2 2.11 3.2 3.13 3.25
2.3 2.12 3.3 3.14
2.4 2.13 3.3A 3.8
2.5 2.14 3.4 3.16
2.6 2.8 3.5 3.17
2.7 2.16 3.6 3.18
2.8 2.17 3.7 3.19
2.9 3.8 3.20
3.9 3.21
3.10 3.22
3.11 3.23

English (GB)
17
10. Setting by means of the control panel
10.1 Control panel
The control panel is used for local setting of the CUE. The
functions available depend on the pump family connected to the
CUE.
Fig. 29 Control panel of the CUE
Editing buttons
Navigating buttons
The editing buttons of the control panel can be set to these
values:
•Active
•Notactive.
When set to "Not active" (locked), the editing buttons do not
function. It is only possible to navigate in the menus and read
values.
Activate or deactivate the buttons by pressing the arrow up and
arrow down buttons simultaneously for 3 seconds.
Adjusting the display contrast
Press [OK] and [+] for darker display.
Press [OK] and [-] for brighter display.
Indicator lights
The operating condition of the pump is indicated by the indicator
lights on the front of the control panel. See fig. 29.
The table shows the function of the indicator lights.
Warning
The on/off button on the control panel does not
disconnect the CUE from the power supply and must
therefore not be used as a safety switch.
The on/off button has the highest priority. In "off"
condition, pump operation is not possible.
TM03 8719 2507
Button Function
Makes the pump ready for operation/starts and
stops the pump.
Saves changed values, resets alarms and expands
the value field.
Changes values in the value field.
On/On/
Off
+
-
CUCUE
>
>
>
>
OK
On/On/
Off
OnOn
Off
Alarm
Alarm
On/On/
Off
OK
+
-
Button Function
Navigates from one menu to another. When the
menu is changed, the display shown will always be
the top display of the new menu.
Navigates up and down in the individual menu.
Indicator
light Function
On (green)
The pump is running or has been stopped by a
stop function.
If flashing, the pump has been stopped by the
user (CUE menu), external start/stop or bus.
Off (orange) The pump has been stopped with the on/off
button.
Alarm (red) Indicates an alarm or a warning.
>
>
>
>

English (GB)
18
Displays, general terms
Figures 30 and 31 show the general terms of the display.
Fig. 30 Example of display in the startup guide
Fig. 31 Example of display in the user menu
10.2 Back to factory settings
Follow this procedure to get back to the factory settings:
1. Switch off the power supply to the CUE.
2. Press [On/Off], [OK] and [+] while switching on the power
supply.
The CUE will reset all parameters to factory settings. The display
will turn on when the reset is completed.
10.3 CUE settings
The startup guide includes all parameters that can be set on the
control panel of the CUE.
The document includes a special table for additional PC Tool
settings and a page where special PC Tool programming details
should be entered.
If you want to download the document, please contact your local
Grundfos company.
10.4 Startup guide
Use the startup guide for the general setting of the CUE including
the setting of the correct direction of rotation.
The startup guide is started the first time when the CUE is
connected to the power supply. It can be restarted in the
"GENERAL" menu. Please note that in this case all previous
settings will be erased.
Bulleted lists show possible settings. Factory settings are shown
in bold.
10.4.1 Welcoming display
• Press [OK]. You will now be guided through the startup guide.
10.4.2 Language (1/16)
Select the language to be used in the display:
10.4.3 Units (2/16)
Select the units to be used in the display:
• SI: m, kW, bar...
• US: ft, HP, psi...
TM04 7313 1810
Display name
Current display / total number
Value field
Display name
Display number, menu name
Value field
Note
Check that equipment connected is ready for startup,
and that the CUE has been connected to the power
supply.
Have nameplate data for motor, pump and CUE at
hand.
• English UK
•EnglishUS
•German
• French
• Italian
• Spanish
• Portuguese
• Greek
•Dutch
•Swedish
• Finnish
•Danish
•Polish
• Russian
• Hungarian
• Czech
• Chinese
• Japanese
• Korean.

English (GB)
19
10.4.4 Pump family (3/16)
Select pump family according to the pump nameplate:
• CR, CRI, CRN, CRT
• SP, SP-G, SP-NE
•...
Select "Other" if the pump family is not on the list.
10.4.5 Rated motor power (4/16)
Set the rated motor power, P2, according to the motor nameplate:
• 0.55 - 90 kW.
The setting range is size-related, and the factory setting
corresponds to the rated power of the CUE.
10.4.6 Supply voltage (5/16)
Select supply voltage according to the rated supply voltage of the
installation site.
* Single-phase input - three-phase output.
The setting range depends on the CUE type, and the factory
setting corresponds to the rated supply voltage of the CUE.
10.4.7 Max. motor current (6/16)
Set the maximum motor current according to the motor
nameplate:
• 0-999 A.
The setting range depends on the CUE type, and the factory
setting corresponds to a typical motor current at the motor power
selected.
Max. current will be limited to the value on the CUE nameplate,
even if it is set to a higher value during setup.
10.4.8 Speed (7/16)
Set the rated speed according to the pump nameplate:
• 0-9999 min-1.
The factory setting depends on previous selections. Based on the
set rated speed, the CUE will automatically set the motor
frequency to 50 or 60 Hz.
10.4.9 Frequency (7A/16)
This display appears only if manual entry of the frequency is
required.
Set the frequency according to the motor nameplate:
• 40-200 Hz.
The factory setting depends on previous selections.
Unit 1 x 200-240 V:*
• 1 x 200 V
• 1 x 208 V
• 1 x 220 V
• 1 x 230 V
• 1 x 240 V.
Unit 3 x 200-240 V:
• 3 x 200 V
• 3 x 208 V
• 3 x 220 V
• 3 x 230 V
• 3 x 240 V.
Unit 3 x 380-500 V:
• 3 x 380 V
• 3 x 400 V
• 3 x 48 V
• 3 x 440 V
• 3 x 460 V
• 3 x 500 V.
Unit 3 x 525-600 V:
• 3 x 575 V.
Unit 3 x 525-690 V:
• 3 x 575 V
• 3 x 690 V.

English (GB)
20
10.4.10 Control mode (8/16)
Select the desired control mode. See section 10.8.1 Control
mode (3.1).
• Open loop
• Constant pressure
• Constant differential pressure
• Proportional differential pressure
• Constant flow rate
• Constant temperature
• Constant level
• Constant other value.
The possible settings and the factory setting depend on the pump
family.
The CUE will give an alarm if the control mode selected requires
a sensor and no sensor has been installed. To continue the
setting without a sensor, select "Open loop", and proceed. When
a sensor has been connected, set the sensor and control mode in
the "INSTALLATION" menu.
10.4.11 Rated flow rate (8A/16)
This display appears only if the control mode selected is
proportional differential pressure.
Set the rated flow rate according to the pump nameplate:
• 1-6550 m3/h.
10.4.12 Rated head (8B/16)
This display only appears if the control mode selected is
proportional differential pressure.
Set the rated head according to the pump nameplate:
• 1-999 m.
10.4.13 Sensor connected to terminal 54 (9/16)
Set the measuring range of the connected sensor with a signal
range of 4-20 mA. The measuring range depends on the control
mode selected:
If the control mode selected is "Constant other value", or if the
measuring range selected is "Other", the sensor must be set
according to the next section, display 9A/16.
Proportional differential pressure:
• 0-0.6 bar
•0-1bar
• 0-1.6 bar
• 0-2.5 bar
•0-4bar
•0-6bar
• 0-10 bar
•Other.
Constant differential pressure:
• 0-0.6 bar
• 0-1.6 bar
• 0-2.5 bar
•0-4bar
• 0-6 bar
• 0-10 bar
•Other.
Constant pressure:
• 0-2.5 bar
•0-4bar
•0-6bar
• 0-10 bar
• 0-16 bar
• 0-25 bar
•Other.
Constant flow rate:
•1-5m
3/h
•2-10m
3/h
•6-30m
3/h
•8-75m
3/h
•Other.
Constant temperature:
• -25 to 25 °C
• 0 to 25 °C
• 50 to 100 °C
• 0 to 80 °C
•Other.
Constant level:
• 0-0.1 bar
• 0-1 bar
• 0-2.5 bar
• 0-6 bar
• 0-10 bar
•Other.