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Product Care and Maintenance
Operating Environment
See Product Specifications section.
Transport and Storage Environment
• Temperature: -4˚F to 104˚F (-20˚C to 40˚C)
• Relative humidity: 10% to 85%
• Atmospheric pressure: 0.5 atm to 1.0 atm (500 hPa to 1060 hPa)
See Product Specifications section for dimensions and weights of system components.
Troubleshooting
Problem
The Handpiece indicator lights don't
illuminate.
The Handpiece is in the Charging Dock, but
the Charging Indicator Lights don't light.
The Handpiece Indicator Lights are
blinking.
The Handpiece sounds (beeps) have
stopped.
The Handpiece beeps once each second
during a curing cycle.
A Radiometer test has less than three
lights illuminated.
The Charging Indicator Lights on the
Charging Dock blink continuously when
the Demi Ultra unit is in the Charging
Dock.
If the resolutions suggested above do not resolve the issue, or for other issues not listed here, please contact
customer care (see Contact Customer Care).
Resolution
The electrical charge may be completely drained. Put the Handpiece
in the Charging Dock for 70 seconds.
Check to verify that the power cord is inserted into the Dock and into
a power receptacle.
Check the power supply and cord for damage. If there is damage
discontinue use of the power supply.
Verify that the LED Light Attachment is fully seated into the Magnetic
Socket.
The Handpiece is in Silent Mode. Press and hold the Curing Time
Selector button for 10 seconds to turn off Silent Mode. The unit will
beep twice to indicate the Silent Mode setting has been changed.
This indicates PLS is not active, which occurs when the LED Light
Button is pressed and held. Press and release the button when
activating a curing cycle.
First, confirm that the LED Light Attachment is flush with the
radiometer Sensor and centered within the white circle provided.
Debris may be blocking or clouding the LED Light Attachment lens or
the Radiometer Sensor. See cleaning instructions in the Product Care
and Maintenance section.
The unit may not be seated properly in the Charging Dock. Remove
and reseat it.
Check the electrical contacts on the Charging Dock and Handpiece to
see if they are fouled. If so, clean the contacts with a dry cloth, and
reseat the unit.
If the above actions do not resolve the problem, the Demi Ultra may
require service by a qualified technician. Contact Kerr Customer Care
(see back cover) for details on shipping to a service center.
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