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Installation and operating instructions
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This manual introduces all aspects of your Grundfos CUE
frequency converter in the power range of 0.55 to 90 kW.
Always keep this manual close to the CUE.
> ? @ A B C B D E F G B H I D J K L J M C
CUE is a series of external frequency converters especially
designed for pumps.
Thanks to the start-up 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.
> ? > N K K F J I E L J M C H
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 the mains voltage or power ranges not covered by the
E-pump range.
• in applications where an integrated frequency converter is not
desirable or permissible.
> ? O P B Q B D B C I B H
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.
• Service instructions contain all required instructions for
dismantling and repairing the frequency converter.
Technical documentation is available on www.grundfos.com >
International website > WebCAPS.
If you have any questions, please contact the nearest Grundfos
company or service workshop.
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2.1 General description 3
2.2 Applications 3
2.3 References 3
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3.1 Warning 4
3.2 Safety regulations 4
3.3 Installation requirements 4
3.4 Reduced performance under certain conditions 4
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4.1 Nameplate 4
4.2 Packaging label 4
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5.1 Reception and storage 5
5.2 Transportation and unpacking 5
5.3 Space requirements and air circulation 5
5.4 Mounting 5
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6.1 Electrical protection 6
6.2 Mains and motor connection 6
6.3 Connecting the signal terminals 10
6.4 Connecting the signal relays 12
6.5 Connecting the MCB 114 sensor input module 14
6.6 EMC-correct installation 14
6.7 RFI filters 15
6.8 Output filters 15
6.9 Motor cable 15
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8.1 Uncontrolled operation (open loop) 16
8.2 Controlled operation (closed loop) 16
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10.1 Control panel 19
10.2 Back to factory setting 19
10.3 CUE settings 19
10.4 Start-up guide 20
10.5 Menu GENERAL 23
10.6 Menu OPERATION 24
10.7 Menu STATUS 25
10.8 Menu INSTALLATION 26
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12.1 Control without bus signal, local operating mode 33
12.2 Control with bus signal, remote-controlled operating
mode 33
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13.1 Digital inputs 33
13.2 External setpoint 33
13.3 GENIbus signal 34
13.4 Other bus standards 34
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14.1 Cleaning the CUE 34
14.2 Service parts and service kits 34
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15.1 Warning and alarm list 34
15.2 Resetting of alarms 35
15.3 Indicator lights 35
15.4 Signal relays 35
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16.1 Enclosure 36
16.2 Cable entry 36
16.3 Main dimensions and weight 37
16.4 Surroundings 37
16.5 Terminal tightening torques 37
16.6 Cable length 38
16.7 Fuses and cable cross-section 38
16.8 Inputs and outputs 40
16.9 Sound pressure level 40
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