Procenter Cuspidor Troubleshooting

Symptom Probable Cause Check Solution
Neither cup filler or bowl rinse have water. Handpieces and syringe work properly. Damaged or disconnected tubing. Check 1/4” blue tubing, between J-box and cuspidor, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/8” tubing, between cuspidor and console (connection box under seat on LR chair), for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Symptom Probable Cause Check Solution
When either cup filler button is pressed, no water comes out. Bowl rinse works properly. Cup filler flow adjustment valve set too low. - Adjust cup filler flow adjustment knob.
Cup fill push button valves malfunctioning. Replace suspect cup fill push button valves with known working valves. Replace cup fill push button valves.
Cup fill (pilot / primary) air valve malfunctioning. Replace suspect valve with known working valve. Replace cup fill (pilot / primary) air valve.
Cup fill water valve malfunctioning. Replace cup fill water valve with known working valve.

Try to flush any debris out of valve.

Replace cup fill water valve if necessary.
Damaged or disconnected tubing. Check 1/8” white tubing, between two cup filler push button valves and shuttle valve, and 1/8” white tubing, between shuttle valve and cup filler air timing valve, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/4” yellow tubing, between two cup filler air timing valves, for damage. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/8” red tubing, between two cup filler air timing valves and cup fill water valve, for damage. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/4” blue tubing, between two cup filler adjustment valve and cup fill water valve, for damage. Replace damaged tubing. Reconnect tubing if necessary.
Symptom Probable Cause Check Solution
When bowl flush push button is pressed, no water comes out. Cup filler works properly. Bowl flush push button valve malfunctioning. Replace push button valve with known working valve. Replace bowl flush push button valve.
Bowl flush control pinch valve adjusted too tightly. Check adjustment of valve. Adjust pinch valve.
Bowl flush water valve is malfunctioning. Replace suspect valve with known working valve.

Try to flush any debris out of valve.

Replace bowl flush water valve if necessary.
Damaged or disconnected tubing. Check all 1/8” red tubing, between bowl flush push button valve, bowl flush solenoid, bowl flush air timing valve, and bowl flush water valve, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Check 1/4” blue tubing, between bowl flush pinch valve and bowl flush water valve, for damage and proper connections. Replace damaged tubing. Reconnect tubing if necessary.
Symptom Probable Cause Check Solution
Water to bowl flush runs continuously. Cup filler works properly. Bowl flush push button valve malfunctioning. Replace suspect valve with known working valve. Replace bowl flush push button valve.
Bowl flush water valve is malfunctioning. Replace suspect valve with known working valve.

Try to flush any debris out of valve.

Replace bowl flush water valve if necessary.
Bowl flush solenoid is malfunctioning. Check for voltage across solenoid.

If no voltage is present, replace bowl flush solenoid.

If voltage is present, replace chair PC board.

Refer to service information for dental chair.
Symptom Probable Cause Check Solution
Water to cup filler runs continuously. Bowl rinse works properly. One of the cup filler push button valves stuck open. Replace suspect valve with known working valve. Replace cup filler push button valve.
Symptom Probable Cause Check Solution
Bowl flush stops immediately after button is released or does not run for desired length of time (too long / too short). Bowl flush timing adjustment valve out of adjustment or malfunctioning. Adjust bowl flush timing adjustment valve. Replace bowl flush timing adjustment valve.
Symptom Probable Cause Check Solution
Cup fill stops immediately after button is released or does not run for desired length of time (too long / too short). Cup fill timing adjustment valve is out of adjustment or malfunctioning. Adjust cup fill timing valve. Replace cup fill timing adjustment valve.
Symptom Probable Cause Check Solution
Cuspidor bowl overflows. Damaged drain line. Check drain line for damage. Replace drain line.
Clogged drain line or facility drain. Check drain line and facility drain for clogs. Clear drain of any possible obstructions.