Asepsis 21® Delivery and International (Whip) Delivery Troubleshooting

Use these troubleshooting tables to help you determine the cause of a delivery system malfunction.

Symptom Probable Cause Check Correction

There is no water or air present at any of the handpieces or syringe(s).

 

Air on/off valve is turned off or malfunctioning.

Check that air on/off valve is turned on.

Contact licensed plumber to replace air on/off valve.

Master on/off switch valve is turned off or malfunctioning.

Check that master on/off switch valve is turned on.

Replace master on/off switch valve if necessary.
Symptom Probable Cause Check Correction

None of the handpieces will run, but coolant water and syringe water work properly.

Main air regulator turned down too low or malfunctioning.

Check that air regulator output pressure is 80 PSI.

Adjust air regulator output pressure until it is 80 PSI.
If necessary, clean or replace air regulator.

Drive air foot pedal valve in foot control is malfunctioning or stuck closed.

Check for proper air flow out of foot control when foot control pedal is depressed.

Repair damaged foot control. If necessary, replace foot control.

Pilot operated valve block is malfunctioning or has dirt in it.

Clean valve block or replace suspect pilot operated valve block with known working valve block.

Clean pilot operated valve block. Replace, if necessary.

Air tubing from pilot operated valve block to foot control to delivery head is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.

Syringe air and water work properly, but handpieces do not run or have water.

Air tubing from air regulator to foot control damaged, loose, or disconnected.

Check air tube for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.

Handpieces have water but do not run.

Drive air foot pedal valve is stuck closed.

Replace suspect foot control with known working foot control.

Clean out drive air foot pedal valve. If necessary, replace entire foot control -foot control switch valves are not available.

Tubing for drive air from foot pedal valve to delivery head is damaged, loose, or disconnected.

Check for air leaking from tubing and check air tubing for damage, looseness, or disconnection

Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction

One handpiece does not run or have water. All other handpieces work properly.

Handpiece on/off valve is malfunctioning or stuck open keeping kink valve “kinked”.

Replace suspect handpiece on/off valve with known working on/off valve.

Replace handpiece on/off valve.

Air actuator for handpiece is malfunctioning.

Check to see if kink valve “unkinks” when handpiece is removed from handpiece holder.

Replace air actuator.

Tubing to handpiece on/off valve and then to air actuator is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.

One handpiece does not run, but has water and coolant air. All other handpieces work properly.

Drive air flow adjustment valve has been adjusted too tightly, closing off air flow to handpiece.

Check to see if airflow has been cut off.

Loosen adjustment knob of drive air flow adjustment valve.

Drive air tubing to handpiece position is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction

No water to handpieces or syringe, but handpieces run.

Water on/off valve is turned off or malfunctioning.

Check that water on/off valve is turned on.

Contact licensed plumber to replace on/off valve.

Master on/off switch valve is turned off or malfunctioning.

Check to ensure master on/off switch valve is turned on.

Replace master on/off switch valve if necessary.

City water systems only: Pilot operated valve block malfunctioning or blocked (water side only).

Check that output pressure is approximately 40 - 50 PSI.

Clean or flush out pilot operated valve block. If necessary, disassemble and clean pilot operated valve block.

City water systems only: Water regulator setting is too low or malfunctioning.

Check that water regulator output pressure is 40 PSI.

Adjust water regulator output pressure until it is 40 PSI.
If necessary, clean or replace water regulator.

Self contained water systems only: Air regulator, to water bottle, setting is too low or malfunctioning.

Check that air regulator output pressure is 40 PSI.

Adjust air regulator output pressure until it is 40 PSI.
If necessary, clean or replace air regulator.

Self contained water systems only: Air tubing to water bottle switch valve or water bottle is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.

Self contained water systems only: Water bottle switch valve turned off or malfunctioning.

Check that water bottle switch valve on side of console is turned on.

Replace water bottle switch valve if necessary.

Self contained water systems only - Bad water bottle gasket.

Check for air leaking from top of water bottle.

Replace water bottle gasket.
Symptom Probable Cause Check Correction

All handpieces run and syringe(s) work properly, but there is no water to any of the handpieces.

Coolant water control valve (anti-retraction valve) is stuck closed.

Replace suspect coolant water control valve with known working valve.

Replace coolant water control valve.

Coolant water toggle valve on foot control is turned off.

Check that coolant water toggle is turned on.

Turn coolant water toggle on.

Coolant water toggle valve on foot control is malfunctioning.

Check for water pressure at output of coolant water toggle valve.

Replace entire foot control - foot control switch valves are not available.

Orange tubing, signal line from foot control to coolant water control valve, is twisted, pinching off airflow.

Check if stop pin in arm is damaged or missing. Check if tubing is excessively twisted or pinched.

Untwist tubing and replace stop pin in arm.

Water tubing from coolant water control valve to kink valves is damaged, loose, or disconnected.

Check water tube for damage, looseness, or disconnection. Check for any water leakage from tube.

Replace damaged tubing. Reconnect any loose or disconnected tubing.

Handpiece runs, but there is no water to handpiece. Other handpieces work correctly.

Coolant water flow adjustment valve has been adjusted too tightly, closing off water flow to handpiece.

Check to see if water flow has been cut off.

Loosen adjustment knob of coolant water flow adjustment valve.

Drive air tubing to handpiece position is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction

When removed from handpiece holder, water comes out of any handpiece without foot control pedal being depressed.

Coolant water toggle valve is malfunctioning. Bleed port is clogged allowing pressure to remain in air line.

Pull off orange signal line and check for residual air pressure. Residual air pressure indicates bleed port is not working.

Replace entire foot control - foot control toggle valve is not available.

Coolant water control valve (anti-retraction valve) stuck open.

Replace with known working coolant water control valve.

Replace coolant water control valve.

Coolant water flush valve is malfunctioning or stuck open.

Replace suspect coolant water flush valve with known working flush valve.

Replace coolant water flush valve.

One of the coolant water flush check valves is malfunctioning or stuck open.

Check each coolant water flush check valve to see if it is stuck open.

Flush out coolant water flush check valve. Replace coolant water flush check valve if necessary.
Symptom Probable Cause Check Correction

Water sputters when handpiece is used.

Air in lines.

Check for air in coolant water lines.

Depress coolant water flush valve button and hold for approximately 45 seconds.

Water is leaking into oil jar.

Handpiece is not sealing at hose connection point causing water to leak into exhaust hole.

Check for damaged or missing gasket in handpiece.

Replace damaged or missing gaskets.

Water pressure at handpieces and syringes is too low.

City water systems only: Water regulator setting is too low and needs adjusted.

Check that water regulator output pressure is 40 PSI.

Adjust water regulator output pressure until it is 40 PSI.
If necessary, clean or replace water regulator.

Self contained water systems only: Air regulator, to water bottle, setting is too low and needs adjusted.

Check that air regulator output pressure is 40 PSI.

Adjust air regulator output pressure until it is 40 PSI.
If necessary, clean or replace air regulator.

Self contained water systems only: Air tubing to water bottle switch valve or water bottle is damaged or leaking.

Check air tubes for damage or looseness.

Replace damaged tubing. Reconnect any loose tubing.

Self contained water systems only: Water tubing from water bottle to delivery head or syringe(s) is damaged or leaking.

Check water tubes for damage or looseness.

Replace damaged tubing. Reconnect any loose tubing.

Self contained water systems only: Water bottle switch valve is partially obstructed.

Check that water flow at output of water bottle switch is sufficient.

Replace water bottle switch valve if necessary.

Self contained water systems only: Bad water bottle gasket.

Check for air leaking from top of water bottle.

Replace water bottle gasket.

While one handpiece is in use, one or more additional handpieces run even though they are in handpiece holders.

Suspect handpiece is not stored properly in its handpiece holder, so button of handpiece on/off valve is not being fully depressed.

Check to see if a kink valve assembly of an unused handpiece is “unkinked”, even though handpiece is in handpiece holder.

Make sure operators know to properly return handpieces to fully stowed position in handpiece holders.

Handpiece on/off valve is out of adjustment and is not being activated properly when handpiece is returned to stored position in handpiece holder.

Check to see if handpiece on/off valve is activated when handpiece is inserted in handpiece holder.

Adjust handpiece on/off valve button, so it properly activates when handpiece is inserted in handpiece holder.

Handpiece on/off valve on suspect handpiece position is malfunctioning or stuck closed.

Check to see if a kink valve assembly of an unused handpiece is “unkinked”, even though handpiece is in handpiece holder. Check handpiece on/off valve for proper operation.

Replace handpiece on/off valve.

Air gauge check valve of handpiece being used is malfunctioning and possibly stuck open allowing drive air to run other handpiece positions.

Inspect air gauge check valve of handpiece position causing the problem to see if it is stuck open or replace suspect air gauge check valve with known working check valve.

Replace air gauge check valve.

Leaking tube connector.

Check for leaks at connection point between handpiece and tube connector.

Replace tube connector.

Kink valve of suspect position is not kinking properly.

Check to see if kink valve is leaking.

Adjust kink valve. Replace kink valve if necessary.

Handpiece runs momentarily after it is removed from the handpiece holder even though foot control pedal is not depressed.

Drive air foot pedal valve is malfunctioning. Bleed port is clogged allowing pressure to remain in drive air line.

Pull off drive air line and check for residual air pressure. Residual air pressure indicates bleed port is not working.

Replace entire foot control- drive air foot pedal valve is not available.

Main air switch is turned off, but kink valves don’t unkink.

Drive air foot pedal valve is malfunctioning. Bleed port is clogged allowing pressure to remain in drive air line.

Pull off drive air line and check for residual air pressure. Residual air pressure indicates bleed port is not working.

 

Replace entire foot control- drive air foot pedal valve is not available.

Master on/off switch valve malfunctioning or stuck open.

Replace suspect master on/off switch valve with known working switch valve.

Replace master on/off valve.

Coolant air only is not working.

Coolant air flow adjustment valve has been adjusted too tightly, closing off air flow to handpieces.

Check to see if airflow has been cut off.

Loosen adjustment knob of coolant air flow adjustment valve.

Coolant air tubing to handpiece positions is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction

Syringe has no air.

Syringe air flow adjustment valve is closed too tightly.

Check syringe air flow adjustment valve for proper adjustment.

Replace syringe air flow adjustment valve if necessary.

Syringe air tubing to syringe is damaged, loose, or disconnected.

Check air tubes for damage, looseness, or disconnection.

Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction

Adjustment screws will not tighten.

Too much plating.

-

Retap adjustment screws and screw holes.

Symptom Probable Cause Check Correction
Air lock flex arm will not lock. Bread tie used for shipping not removed. Check to see if bread tie is still in place. Remove bread tie.
Arm lock cylinder switch valve is malfunctioning. Bleed port is clogged allowing pressure to remain in flex arm cylinder air line. Pull off flex arm cylinder air line and check for residual air pressure. Residual air pressure indicates bleed port is not working. Replace arm lock cylinder switch valve.
Arm lock cylinder switch valve is malfunctioning or stuck open. Replace suspect arm lock cylinder switch valve with a known working switch valve. Replace arm lock cylinder switch valve.
Symptom Probable Cause Check Correction

Even though arm lock cylinder is energized, flex arm will not unlock.

 Locking pawls in flex arm have become loose and have slipped off of arm lock cylinder pin. Check to see if pawls are installed on arm lock cylinder pin. Re-install locking pawls back on arm lock cylinder pin and tighten mounting hardware.
Symptom Probable Cause Check Correction
Air lock flex arm drifts down. Spring tension jam nut needs adjusted. - Tighten jam nut in arm.
Air lock flex arm drifts up. Spring tension jam nut needs adjusted. - Loosen jam nut in arm.
Symptom Probable Cause Check Correction
Air lock flex arm locks but air constantly leaking. Bad bleed off valve on arm lock cylinder switch valve. Replace suspect arm lock cylinder switch valve with known working switch valve. Replace arm lock cylinder switch valve.
Symptom Probable Cause Check Correction
- Too much plating causes adjustment knob to be too difficult to turn. Check for excessive plating in adjustment knob hole. Retap hole to clean out excess plating.
Symptom Probable Cause Check Correction
Neither cup filler or bowl rinse have water. Pilot operated valve block malfunctioning. Replace suspect pilot operated valve block with known working valve block. Replace pilot operated valve block.
Main water tubing from pilot operated valve block to cuspidor is damaged, loose, or disconnected. Check water tubes for damage, looseness, or disconnection. Replace damaged tubing. Reconnect any loose or disconnected tubing.
Water on/off valve is turned off or malfunctioning. Check that water on/off valve is turned on. Replace water on/off valve if necessary.
Symptom Probable Cause Check Correction
When either cup filler button is pressed, no water comes out. Bowl rinse works correctly. Cup filler flow adjustment valve has been adjusted too tightly, closing off water to cup filler. Check to see if water flow to cup filler has been cut off. Loosen adjustment knob of cup filler flow adjustment valve.
Tubing between cup filler push button valves and cup filler is damaged, loose, or disconnected. Check water tubes for damage, looseness, or disconnection. Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction
When bowl rinse push button is pressed, no water comes out. Cup filler works correctly. Bowl rinse push button valve is malfunctioning or stuck closed. Replace suspect bowl rinse push button valve with known working push button valve. Replace bowl rinse push button valve.
Water saver control valve is stuck closed. Replace suspect water saver control valve with known working water saver control valve. Try to flush any debris out of valve. Replace water saver control valve if necessary.
Air pressure from main air regulator is too low and needs adjusted. Check to see if air pressure from main air regulator is 80 PSI. Adjust main air regulator output pressure until it is 80 PSI. If necessary, clean or replace air regulator.
Tubing between water saver control valve and main air regulator is damaged, loose, or disconnected. Check air tubing for damage, looseness, or dis-connection. Replace damaged tubing. Reconnect any loose or disconnected tubing.
Adjustable time delay bleed off valve is malfunctioning. Check to see if air pressure remains in tubing or bleeds off immediately. Replace adjustable time delay bleed off valve.
Bowl rinse flow adjustment has been adjusted too tightly, closing off water to bowl rinse. Check to see if water flow to bowl rinse has been cut off. Loosen adjustment knob of bowl rinse flow adjustment valve.
Tubing between water saver control valve and bowl rinse tube damaged, loose, or disconnected. Check water tubes for damage, looseness, or disconnection. Replace damaged tubing. Reconnect any loose or disconnected tubing.
Symptom Probable Cause Check Correction
Water to bowl rinse runs continuously. Cup filler works correctly. Water saver control valve stuck open. Replace with known working water saver control valve. Malfunctioning or dirty. Replace water saver control valve.

Adjustable time delay bleed off valve is malfunctioning. Bleed port is clogged allowing air pressure to remain in water control saver line after the time delay setting has passed.

Pull off adjustable time delay bleed off valve line and check for residual air pressure. Residual air pressure indicates bleed port is not working.

Replace adjustable time delay bleed off valve.
Bowl rinse push button valve is malfunctioning or stuck open. Replace suspect bowl rinse push button valve with known working valve. Replace bowl rinse push button valve.
Symptom Probable Cause Check Correction
Water to cup filler runs continuously. Bowl rinse works correctly. One of the cup filler push button valves stuck open. Check cup filler push button valves or replace suspect cup filler push button valve with known working valve. Replace cup filler push button valve.
Symptom Probable Cause Check Correction
Bowl rinse stops immediately after button is released or does not run long enough (up to 45 seconds) Adjustable time delay bleed off valve needs adjusted. Adjust time delay bleed off valve. Adjust set screw of time delay bleed off valve under cuspidor.
Adjustable time delay bleed off valve is malfunctioning. Bleed port is open allowing pressure to escape from water control saver line too quickly. Replace suspect adjustable time delay bleed off valve with known working bleed off valve. Replace adjustable time delay bleed off valve.
Symptom Probable Cause Check Correction
No water is present at syringe and water quick connect. Air or water on/off valves are turned off or are malfunctioning. Check that air or water on/off valves are turned on. Replace air or water on/off valves if necessary.
Master on/off switch valve is turned off or malfunctioning. Check to ensure master on/off switch valve is turned on. Replace master on/off switch valve if necessary.
City water systems only: Pilot operated valve block malfunctioning or blocked (water side only). Check that output pressure is approximately 40 - 50 PSI. Clean or flush out pilot operated valve block. If necessary, disassemble and clean pilot operated valve block.
City water systems only: Water regulator setting is too low or malfunctioning. Check that water regulator output pressure is 40 PSI. Adjust water regulator output pressure until it is 40 PSI. If necessary, clean or replace water regulator.
Distilled water systems only. Water bottle is empty. Check that there is water in water bottle. Fill water bottle with distilled water.
Distilled water systems only. Air regulator, to water bottle, setting is too low or malfunctioning. Check that air regulator output pressure is 40 PSI. Adjust air regulator output pressure until it is 40 PSI. If necessary, clean or replace air regulator.
Tubing between manifold or distilled water bottle and syringe is damaged, loose, or disconnected. Check water tubes for damage, looseness, or disconnection. Replace damaged tubing. Reconnect any loose or disconnected tubing.
Air or water on/off valves are turned off or are malfunctioning. Check that air or water on/off valves are turned on. Replace air or water on/off valves if necessary.
Syringe water flow adjustment valve has been adjusted too tightly, closing off water to syringe. Check to see if water flow to syringe has been cut off. Loosen adjustment knob of syringe water flow adjustment valve.
Distilled water systems only: Water bottle switch valve turned off or malfunctioning. Check that water bottle switch valve on side of console is turned on. Replace water bottle switch valve if necessary.
Distilled water systems only: Bad water bottle gasket. Check for air leaking from top of water bottle. Replace water bottle gasket.