DentalEZ Core, User Manual, Page: 43 / 57

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40
CORE
TM
Magellan Unit
PN: 2717-267C
Section VII User Service Information
Handpiece
Symptom Possible Cause(s) Solution
No drive air Drive air fl ow adjustments on pinch valves
are closed
Turn adjustments screw counterclockwise to adjust drive air pressure.
Set to manufacturer's recommended pressure.
Faulty handpiece holder valve If valve does not release with handpiece out of holder and tubing to
holder is not restricted, replace hanger valve.
Faulty foot control Depress foot control if no air is present, repair or replace foot control.
Pinched or restricted tubing Straighten or replace the 1/4" red tubing.
No fi ber-optic light
at handpiece
Power transformer is not plugged in Plug transformer into designated receptacle in USC.
Internal wires in control head and
post-mounted console are not connected
Check connections in control head and post-mounted console.
No signal air to fi ber optic lamp control Check pinched or restricted tubing.
Faulty transformer Check output for 22-23 VAC.
Faulty fi ber optic control Fiber optic controls have a calibration range of 2.5 to 6.0V DC. Check
for proper voltage according to the handpiece manufacturer’s
recommendations.
Faulty bulb Replace bulb.
No signal air to receptacles in the USC Check for pinched or restricted tubing.
No coolant water
at any handpiece
Coolant water adjustment valve 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.
Water toggle on clean water system is in the
OFF position
Flip toggle to the ON position.
Slide clamp is in clamped position Slide clamp so it moves freely on tubing.
Water bottle empty Fill water bottle.
Pressure too low on clean water system Verify clean water system pressure gauge reads 40 PSI and adjust
accordingly.
Pinched or restricted tubing Straighten or replace tubing.
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 fl oor box reads 80 PSI.
Water dribbles
from handpiece
after foot control
is released
Low air pressure Ensure air regulator gauge in fl oor box reads 80 PSI.
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 o ff . Open foot control and inspect water relay 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.
No coolant air to
handpiece
Slide clamp is in clamped position Reposition slide clamp so it moves freely on tubing.
Pinched or restricted tubing Straighten or replace tubing.
Troubleshooting (Continued)