ASI Dental Specialties
7 – TROUBLESHOOTING
www.asisupport.com
Page 3
65-0057 Rev-A (11/12/20)
•
Check the water output side of the relay by disconnecting the tubing from the relay to the control block
and pressing the foot control. If still no flow, replace the water relay valve.
o
Replace with ASI PN 95-0135;
Water Relay Valve
and refer to the applicable technical guideline
(located on ASIsupport.com) for more information.
Water Dripping After Using a Handpiece
•
Check for air in the water line. Run the handpieces for a minute or two to clear any air bubbles out of
the system then check the air water syringe connection at the bulkhead to be sure it is tight and secure.
•
If water drips from only one handpiece, check to see if there is a cracked connector in either end of the
handpiece tubing or the bulkhead itself. Replace the bulkhead or handpiece tubing (
see ASIsupport.com
for tubing options and part numbers
).
•
For systems with a foot control toggle switch, check the foot control signal line. If there is a slight kink in
the foot control tubing, it can delay the air from exhausting off the relay and allows water to drip.
Replace if necessary.
o
Replace with ASI PN 95-0242
Foot Control Toggle Assembly Wet/Dry
and refer to the applicable
technical guideline (located on ASIsupport.com) for more information.
•
If water drips from several handpieces or if water slowly builds and drips out, the water relay may not
be working or has a small piece of debris in it. Replace the water relay valve.
o
Replace with ASI PN 95-0135
Water Relay Valve
and refer to the applicable technical guideline
(located on ASIsupport.com) for more information.
Water Squirts out of Handpiece When Removed from Holder
•
The water relay valve is stuck open allowing water to flow and may need to be replaced. Check the foot
control tubing is not kinked and holding air pressure on the plunger which will hold the valve open.
Replace valve if required.
o
Replace with ASI PN 95-0135
Water Relay Valve
and refer to the applicable technical guideline
(located on ASIsupport.com) for more information.
Syringes Leaking
•
If air or water keeps flowing, the button O-rings are worn and require that the button cartridges be
replaced. Button O-rings may need to be greased with Silicone O-Ring grease.
o
ASI PN 95-0089,
Syringe Repair Kit
o
ASI PN 95-0085,
Silicone
O-Ring Grease
Use only silicone lubricant when lubricating instrumentation O-rings. Petroleum products
(such as Vaseline®) will cause permanent damage to the O-rings.
•
Spray mist occurs when depressing air valve immediately following water valve depression can be
caused by worn nozzle assembly O-rings. Replace O-rings.
o
Replace with ASI PN 95-0089,
Syringe Repair Kit
and refer to the applicable technical guideline
(located on ASIsupport.com) for more information
65-OS01 Rev-A | 11/12/20
