Procenter Assistant's Unit Troubleshooting

Symptom Probable Cause Check Solution
With water selector valve City / Bottle toggle switch in either position, no water is present at syringe or water quick connect. Water selector valve is malfunctioning. Remove outgoing water line from water selector valve, and check if water is present.

If no water is present, clean or replace water selector valve.

Refer to: Console Mtd. Units, LR Units, or Casework Mtd. Units
Damaged or disconnected tubing. Check 1/8” blue tubing, between water selector valve and syringe, and 1/4” blue tubing to water quick connect for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
With water selector valve City / Bottle toggle switch in Bottle position, no water is present at syringe or water quick connect. In City position, water is present. Water bottle is empty. - Fill water bottle with distilled water.
Water bottle gasket is leaking. Check for air leaking around bottle cap. Replace water bottle gasket.
Water bottle air regulator is out of adjustment or malfunctioning. Check air regulator pressure setting.

Adjust air regulator output pressure to 30 PSI.

Clean / replace air regulator if necessary.

Water bottle air regulator, in console or L/R arm, is malfunctioning. Water bottle air regulator output pressure should be 30 PSI. Replace regulator if necessary.
Damaged or disconnected tubing. Check 1/8” brown tubing, between water bottle air regulator in J-box and water bottle, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/8” blue tubing, between water bottle and water selector valve, for damage and proper connection. Replace damaged tubing. Reconnect tubing if necessary.
Water selector valve is malfunctioning. Replace suspect valve with known working valve.

Replace water selector valve.

Refer to: Console Mtd. Units, LR Units, or Casework Mtd. Units
With water selector valve City / Bottle toggle switch in CITY position, no water is present at syringe or water quick connect. In BOTTLE position, water is present. Water manual shut-off valve in J-box is turned off or malfunctioning. Check that water manual shut-off valve is ON. Contact licensed plumber to replace manual shut-off valve.
Damaged or disconnected tubing. Check 1/8” blue tubing, between air regulator in J-box and water selector valve, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Water selector valve is malfunctioning. Replace suspect valve with known working valve.

Replace water selector valve.

Refer to: Console Mtd. Units, LR Units, or Casework Mtd. Units
Symptom Probable Cause Check Solution
No water present at syringe. Water quick connect works properly. Pinch valve in assistant’s unit adjusted too tightly. - Loosen pinch valve.
Syringe valve is malfunctioning. Replace suspect valve with known working valve. Replace syringe button valve.
Symptom Probable Cause Check Solution
No water to quick connect port. Syringe works properly. Water quick connect valve is malfunctioning. Replace suspect valve with known working valve. Replace water quick connect valve.
Symptom Probable Cause Check Solution
With ON/OFF lever(s) open, there is insufficient suction at saliva ejector and HVE. Central vacuum unit is OFF or malfunctioning. Check central vacuum unit. Contact service provider for central vacuum unit if necessary.
Damaged or disconnected tubing. Check 5/8” grey vacuum tubing, between assistant's unit and central vacuum connection in J-box, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Hole plug(s) missing from solids collector Check solids collector. Replace hole plug(s) on solids collector.