TROUBLESHOOTING
problem
caUse
solUtion
Control lamp does not
illuminate when the unit
is switched on.
The power cord or the jack is
disconnected
Check all the connections of the control unit.
Check the power supply to the dental office.
The internal fuse has burned out.
Contact your dealer or Hu-Friedy.
No/poor ultrasonic
vibration and handpiece
is leaking.
The tip is not tightened firmly.
Tighten the tip with the Guardian wrench until you hear
a click.
The tip is worn.
Replace the tip.
Power has not been properly
adjusted for the tip.
Adjust the power setting to the
recommended power range indicated
on the Guardian wrench package insert.
The foot control is disconnected.
Connect the foot control correctly.
Handpiece failure.
Contact your dealer or Hu-Friedy.
Using E-Series Tips.
Check tip part code.
Foot control failure.
Contact your dealer or Hu-Friedy.
The tip is bent or broken.
Excess power to the tip.
Operate the tip only in the recommended power range
indicated on the Guardian wrench or Power Range
guide.
Tip was dropped or mishandled
during cleaning and sterilization.
Always process the tip in the Guardian wrench.
Discard bent or broken tips.
The tip unthreads itself.
The tip is not tightened properly.
Tighten the tip with the Guardian wrench until you hear
a click.
Noise from the
handpiece.
Output has not been properly
adjusted for the tip.
Adjust the power setting to the
recommended power range indicated
on the Guardian wrench or package insert.
The tip is not tightened firmly.
Tighten the tip with the Guardian wrench until you hear
a click.
Vibration failure in the
handpiece or the control unit.
Contact your dealer or Hu-Friedy.
Handpiece is overheating
Output has not been properly
adjusted for the tip.
Adjust the power setting to the recommended power
range indicated on the Guardian wrench or package
insert.
The tip is not tightened properly.
Tighten the tip with the Guardian wrench until you hear
a click.
Vibration failure in the handpiece
or the control unit.
Contact your dealer or Hu-Friedy.
No/poor water flow
(Use of City Water)
No water is flowing to the control
unit.
Check the water line and supply to the control unit.
Water pressure should be set to: 0.1-0.5MPa
(15–73 psi)
No irrigation supply and/or
unstable irrigation supply
(Use of Irrigation
Bottle)
The irrigation pump is running.
The irrigation tube is kinked
Straighten the kinked irrigation tube.
The irrigation pump is not
running. Time to replace Irrigation
Pump (Approximately 500 hours
after first use)
Replace new Irrigation Pump (See page 15, Changing
the Irrigation Pump)
