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Dyson Cu-Beam Down 3K (White)
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Cleaning information
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Video showing fuse replacement
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More help required
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Troubleshooting
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Power issue
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No output from light
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Light not switched on
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Issue resolved
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Check other appliances
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Electrical supply issue
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Issue resolved
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Other appliances working
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Light not accessible
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Check mains electricity
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Output will not turn off
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Unsure on dimmer installation
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No dimmer installed
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Installed with dimmer
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DALI dimmer installed
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Issue not resolved, please speak to our Customer Support Team
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Light working without DALI
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AC Mains/Triac installed
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Analogue dimmer installed
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DALI converter installed
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Issue not resolved, please speak to our Customer Support Team
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Light working without DALI
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No DALI converter
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Unsure on dimmer type
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Output too bright/dim
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No dimmer - light installation
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Not installed correctly
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Installed correctly
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Replacement part required
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Installed to recommendation
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Trim blades fitted incorrectly
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Replacement part required
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Customer has blades
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Replacement part required
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Trim blades correctly fitted
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Output will not dim
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No dimmer installed
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Unsure on dimmer installation
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Visible issue
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Wires are too short
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Replacement part required
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Confirm correct length
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Fuse has not blown
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Fuse intact, check DALI
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Issue not resolved, please speak to our Customer Support Team
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DALI system in use
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Issue not resolved, please speak to our Customer Support Team
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Light working without DALI
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Installation information
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Installation video
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Installation guide
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Useful Information
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Technical specifications
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Most common topics
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Please note; All electrical installation and repair work should be carried out by a qualified electrician in accordance with current local codes or regulations.
Replacing the fuse
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Please select the appropriate symptom.
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Check that other appliances in the room are working, such as other lights, air conditioning, fans/heaters etc.
This is likely to be an issue with the electrical supply and will need to be resolved by an electrician.
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Only check the light if it is safe to do so. If there is any doubt please contact an electrician or maintenance personnel.
Is the light safely accessible?
This is likely to be an issue with the electrical supply and not related to machine itself.
This issue should be resolved by an electrician.
Check that other appliances in the room are working, such as other lights, air conditioning, fans/heaters etc.

Dimmer types
Analogue dimming - this is usually referred to as 1-10v dimming.
DALI - A lighting management control system.
AC mains/TRIAC - AC/TRIAC dimmers are designed for resistive loads such as incandescent or halogen lights. These phase controlled dimmers are not compatible with LEDs since LEDs do not appear as a resistive load.
Please consult an electrician as to whether the light has been installed with a compatible dimmer.
The product needs to be installed with a compatible dimmer in order to adjust the brightness.
Compatible dimmer - OSram DALI MCU
Dimmer types
Analogue dimming - this is usually referred to as 1-10v dimming.
DALI - A lighting management control system.
AC mains/TRIAC - AC/TRIAC dimmers are designed for resistive loads such as incandescent or halogen lights. These phase controlled dimmers are not compatible with LEDs since LEDs do not appear as a resistive load.
What kind of dimmer is the product installed with?
Please disconnect the DALI system. If the light is operational it should power on.
You may need to speak to your DALI engineer to resolve this issue.

Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
As the light is working when the DALI is not connected it is likely to be an issue with the DALI system.
Please contact a DALI engineer to resolve this issue.
The light is not compatible with AC/Mains Triac, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
Please note, a converter is required if an analogue dimmer is being used.
Please disconnect the DALI system. If the light is operational it should power on.
You may need to speak to your DALI engineer to resolve this issue.

Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
As the light is working when the DALI is not connected it is likely to be an issue with the DALI system.
Please contact a DALI engineer to resolve this issue.
The product is not compatible with analogue controls, it will need to be installed with a compatible dimmer, or an analogue to DALI converter, in order to properly function.
Compatible dimmer - OSram DALI MCU
Please consult an electrician as to whether the light has been installed with a compatible dimmer.
This issue can be resolved by reinstalling the light. Cu-Beam Down light is designed to be hung over a table and not used as general lighting for a room.
Please refer to the installation guide.
It is recommended that the lights are installed between 1 and 1.5m from the surface of a table.

What height is the light installed over the table?
We do not advise customers to replace the wires as this will invalidate the warranty. The wires used are to an exact Dyson specification.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
The trim blades are the four plastic blades that connect to the rectangular baffle of the Down light.

To check the blades have been set up correctly, please view the installation guide.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
This issue could be caused by the table surface.
Please note, the Cu-Beam downlight is not suitable for use over glass or reflective surfaces.
Dimmer types
Analogue dimming - this is usually referred to as 1-10v dimming.
DALI - A lighting management control system.
AC mains/TRIAC - AC/TRIAC dimmers are designed for resistive loads such as incandescent or halogen lights. These phase controlled dimmers are not compatible with LEDs since LEDs do not appear as a resistive load.
The product needs to be installed with a compatible dimmer in order to adjust the brightness.
Compatible dimmer - OSram DALI MCU
Please consult an electrician as to whether the light has been installed with a compatible dimmer.
Please select the appropriate symptom.
Your Dyson Cu-Beam light will have been provided with 4m of cable.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
We do not advise customers to replace the wires as this will invalidate the warranty. The wires used are to an exact Dyson specification.
The Dyson Cu-Beam lights are only approved for use with the supplied cable. This cable is to an exact Dyson specification. Replacing the cables will invalidate the guarantee.
Test the fuse
How to test a fuse:
Turn off the light and remove power supply. Ensure that there is no power to the light before removing the fuse.
Turn the meter on and set it to OHMS.
Put one lead on each end of the fuse and check the display on the meter.
Please note; All electrical installation and repair work should be carried out by a qualified electrician in accordance with current local codes or regulations.
Fuse type - 4 AMP 250v Fuse.
Has the fuse blown?
The DALI (Digital Addressable Lighting Interface) is a data protocol and transport mechanism. The common platform of DALI enables equipment from different manufacturers to be connected.
In this instance, we use this as a lighting management control system.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
Please disconnect the DALI system. If the light is operational it should power on.
You may need to speak to your DALI engineer to resolve this issue.

Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please get in touch.
Our experts are ready to help you.
UK based helpline open
8:00am- 8:00pm Monday to Friday
8:00am- 6:00pm Saturday and Sunday
As the light is working when the DALI is not connected it is likely to be an issue with the DALI system.
Please contact a DALI engineer to resolve this issue.
Please select the appropriate option
Installation guide
The installation guide can be found on the above link.
Please select the appropriate option
Further help
Dyson Cu-Beam Down 3K (White)