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Section VII User Service Information
Handpiece
Symptom
Possible Cause(s)
Solution
Water dribbles
from handpiece
while in holder.
Faulty handpiece holder
Repair or replace holder.
Pinched or restricted tubing to
holder
Straighten or replace tubing.
Pinch valve diaphragm is
leaking
Replace diaphragm.
Low air pressure
Ensure air regulator gauge in floor box reads 80 PSI.
Water dribbles
from handpiece
after foot
control is
released.
Faulty water control valve
Depress foot control, then release Remove black
tubing from water control valve. If dribble continues,
replace valve.
Faulty water relay in foot
control
Turn unit
OFF
. Open foot control and inspect water re-
lay block. If piston is not damaged and is moving freely,
stretch the spring. Reassemble and retry foot control.
Pinched or restricted tubing
from foot control
Straighten or replace tubing.
Low air pressure
Ensure air regulator gauge in floor box reads 80 PSI.
No fiber optic
light at
handpiece
Power transformer is not
plugged in.
Plug transformer into designated receptacle in USC.
Internal wires in control head
and/or USC are not connected
Check connections in control head and/or USC.
No signal air to fiber optic
lamp control
Check for pinched or restricted tubing.
Faulty transformer
Check output for 9V.
Faulty bulb
Replace bulb.
No coolant
water at any
handpiece
Coolant water adjustment
valves are closed.
Turn valve counterclockwise to open valve.
Water toggle on foot control is
in the
OFF
position.
Flip toggle to the right for the
ON
position.
Slide clamp is clamping line.
Move clamp to allow water flow through line.
Pinched or restricted tubing
Straighten or replace tubing.
No coolant air
to handpiece
Slide clamp is clamping line.
Move clamp to allow air flow through line.
Pinched or restricted tubing
Straighten or replace tubing.