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Dyson Cu-Beam™ Duo light
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Troubleshooting
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Power issue
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Will not dim
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Dimmer installed
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Analogue dimmer
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DALI converter used
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Still working disconnected
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Visible issue
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Will not dim
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No dimmer installed
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Issue resolved
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Dimmer installed
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DALI dimmer
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Still working disconnected
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Issue not resolved, please speak to our Customer Support Team
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AC Mains/Triac
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More help required
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Cleaning information
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Installation guide
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Technical specifications
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Included in the box
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Analogue dimmer
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No converter; install one
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DALI converter used
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Still working disconnected
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Issue not resolved, please speak to our Customer Support Team
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Unsure on dimmer
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The light is too bright/dim
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No dimmer
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Down; height
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1-1.5m over table
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Check trim blades
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Incorrect, refit
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Issue not resolved, please speak to our Customer Support Team
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Fit OK, table issue
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No trim blades
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Fit blades
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Issue not resolved, please speak to our Customer Support Team
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Issue not resolved, please speak to our Customer Support Team
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Issue not resolved, please speak to our Customer Support Team
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Not over table, reposition
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Up; product height
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Less than 2.5m from floor
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More than 2.5m from floor, reposition light
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Unsure on dimmer
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Dimmer installed
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Unsure on dimmer
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DALI dimmer
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Still working disconnected
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Issue not resolved, please speak to our Customer Support Team
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Analogue dimmer
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DALI converter used
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Still working disconnected
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Issue not resolved, please speak to our Customer Support Team
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No converter; install one
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AC Mains/Triac
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Wire is too short
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Confirm correct length
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Issue not resolved, please speak to our Customer Support Team
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No converter; install one
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AC Mains/Triac
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Unsure on dimmer
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DALI dimmer
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Still working disconnected
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Issue not resolved, please speak to our Customer Support Team
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Unsure on dimmer
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No dimmer installed
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Won't split
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Not DALI
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0-10V/1-10V/PWM
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Split manually
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Manual OK, system issue
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Issue not resolved, please speak to our Customer Support Team
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Analogue; incompatible
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DALI, manual split
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Issue not resolved, please speak to our Customer Support Team
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Unsure on dimmer
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Won't turn off
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No dimmer, check electrics
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Access light
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Check Luminaire
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Issue not resolved, please speak to our Customer Support Team
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Check fuse
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Issue not resolved, please speak to our Customer Support Team
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Reset fuse
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No access; call electrician
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Other lights off; electrics
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Dimmer installed
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Analogue dimmer
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DALI converter used
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Still working disconnected
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No converter; install one
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DALI dimmer
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Issue not resolved, please speak to our Customer Support Team
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Still working disconnected
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AC Mains/Triac
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Unsure on dimmer
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Light won't turn on
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No dimmer, check electrics
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Other lights off; electrics
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Access light
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Check Luminaire
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Check fuse
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Reset fuse
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No access; call electrician
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Unsure on dimmer
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Dimmer installed
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AC Mains/Triac
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Analogue dimmer
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No converter; install one
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DALI converter used
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Issue not resolved, please speak to our Customer Support Team
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Still working disconnected
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DALI dimmer
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Still working disconnected
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Unsure on dimmer
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Popular queries
Please select the appropriate option
Please select the appropriate option
Please select the appropriate option
Which type of dimmer is it?
DALI - A lighting management control system.
Analogue dimming, this is usually referred to as 1-10v dimming.
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 being used?
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.

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
Please select the appropriate option
The product needs to be installed with a compatible dimmer in order to adjust the brightness.
Compatible dimmer - OSram DALI MCU
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Which type of dimmer is it?
DALI - A lighting management control system.
Analogue dimming, this is usually referred to as 1-10v dimming.
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 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.
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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
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 select the appropriate option
Cleaning instructions
As per the recommendations in the operations guide, use a microfiber cloth or solvent and moisture-free compressed air canister to clean the appliance.
Please ensure the appliance is turned off before cleaning.

Installation guide
The installation guide can be found on the above link.
The technical specification can be found on the above link.
Included in the box with your Cu-Beam up light:
Template.

Ceiling box.

Spring Hanger x2.

Ceiling box fascia.

Installation bracket x2.

Screw pozi drive x4.

Adjustable Hangar x2.

Uplight Luminaire.

Please note, a converter is required if an analogue dimmer is being used.
The light is not compatible with analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
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.
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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
What height is the light installed over the table?
The trim blades are the four plastic blades that connect to the rectangular baffle of the downlight.
To check the blades have been set up correctly please refer to the installation guide.
Check the blades have been set up correctly.
Are the trim blades fitted correctly?
Please refer to the user guide and refit Trim blades.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
This issue could be caused by the table surface, Cu-Beam Down light is not suitable for use over glass or reflective surfaces.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
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.
At what height is the product from the floor?
This issue could be resolved by installing a dimmer switch.
Alternatively the issue could be resolved by moving the light to a different location in the room.
Below is information on the different dimmer types available on market:
Analogue dimming, this is usually referred to as 1-10v dimming.
DALI - A lighting management control system.
AC mains/TRIAC - Not Compatible
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 note; All electrical installation and repair work should be carried out by a qualified electrician in accordance with current local codes or regulations.
It is recommended that the product is installed over 2.5m from the floor to prevent glare.
Please refer to the operations manual for further advise.
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
Which type of dimmer is it?
DALI - A lighting management control system.
Analogue dimming, this is usually referred to as 1-10v dimming.
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 being used?
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
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.
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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
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.
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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
The light is not compatible with analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
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
Your Dyson Cu-Beam light will have been provided with 4m of cable.

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.
Apologies. We can’t help you online.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen.
Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
The light is not compatible with analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
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
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
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.

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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
The product needs to be installed with a compatible dimmer in order to adjust the brightness.
Compatible dimmer - OSram DALI MCU
What system is in use?
Check system and connections. Refer to the installation guide for more details.

Has this resolved the problem?
Adjust the upwards and downwards light distribution be manually using the dial on the luminaire (Please refer to the installation guide for further details).

As the light can be split manually, it is likely that the issue lies with the control system.
Please contact your light control system engineer or an electrician to resolve this issue.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
The light is not compatible with analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
When connecting a DALI control system only the function of dimming is possible through the control system.
To adjust the upwards and downwards light distribution, this must be done by manually adjusting the dial on the luminaire (see installation guide for further details).
Both dimming and upwards/downwards light distribution are available through 0-10/1-10/PWM control systems.

Has this resolved the problem?
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
Only check the light if it is safe to do so. If there is any doubt please contact an electrician or maintenance personnel.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
Please note; All electrical installation and repair work should be carried out by a qualified electrician in accordance with current local codes or regulations.
Test the 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.
We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed Sunday
This issue should be resolved by an electrician.
This is likely to be an issue with the electrical supply and will need to be resolved by an electrician.
Which type of dimmer is it?
DALI - A lighting management control system.
Analogue dimming, this is usually referred to as 1-10v dimming.
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 being used?
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.

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 analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
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.

We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed 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
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
This is likely to be an issue with the electrical supply and will need to be resolved by an electrician.
Only check the light if it is safe to do so. If there is any doubt please contact an electrician or maintenance personnel.
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.
This issue should be resolved by an electrician.
Consult an electrician as to whether the light has been installed with a compatible dimmer and/or control system.
Which type of dimmer is it?
DALI - A lighting management control system.
Analogue dimming, this is usually referred to as 1-10v dimming.
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 being used?
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.
The light is not compatible with analogue dimmers without a converter, it will need to be installed with a compatible dimmer in order to dim.
Compatible dimmer - OSram DALI MCU
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.

We need a little more information to help us solve your issue.
Please contact our Customer Support Team by calling 1-866-314-8881 or by clicking the Live Chat button in the bottom right corner of your screen. Dyson Supersonicᵀᴹ hair dryer Professional edition owners should call 1-866-861-2565.
Please get in touch.
Our experts are ready to help you.
US based helpline open
8:00am - 8:00pm Monday to Friday
9:00am - 6:00pm Saturday
Closed 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 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.

Is the light working after you have disconnected the DALI converter?
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.
Further help
Dyson Cu-Beam™ Duo light