TROUBLE SHOOTING GUIDE
Problem
No lights are visible in
the sensor eye.
Valve does not flush.
Light flashes randomly in
sensor eye and valve
does not flush
Lights follow normal
sequence, valve does
not flush.
Valve flushes but does
not shut off.
Leaks
Possible Cause
Electronics fault.
Valve could be sensing a
close by surface or reflections
from some opposite surface.
Lens could be dirty or dam-
aged.
Electrical leads disconnected
or broken wire.
Electrical corrosion has
caused loss of contact.
Sensor not detecting user.
Electronics fault
Water not turned on.
Plugged filter.
Stop valve closed.
Wiring fault.
Solenoid malfunction.
Diaphragm damage or plugged
diaphragm orifice.
Solenoid malfunction
Incorrectly installed.
Damaged O-ring on inlet tube.
Diagnosis
Run through reset procedure
below.
Hold a flat object at an acute
angle to the valve and see if it
flushes ( three ring binder
works well)
Visual inspection of batteries
and battery case.
Check plug insertion and wire
continuity.
Visual inspection
Hold hand at different ranges
in front of valve to see if it can
be detected.
Run through reset procedure
below
Close stop, disconnect valve,
crack stop to check for water.
Close stop, remove and
inspect filter.
Check stop screw.
Check solenoid leads and and
insertion of solenoid plug.
Visual inspection.
Check for leak location.
Check for cuts.
Solution
Reduce sensing range
Eliminate reflective
object.
Replace if obstructed or
damaged
Reinsert plug or repair
leads
Replace
Reset sensor range
(Appendix A)
Find source valve and
turn on.
Clean and reinstall filter
Open stop valve
Reinsert plug or repair
wiring
Clean P6900-SRK
components. See parts
list
Replace diaphragm
Clean P6900-SRK
components. See parts
list
Remove and reinstall.
Pay close attention to
alignment of inlet tube
and outlet boss with
mating pieces.
Replace O-ring
Electronics Reset Procedure: Remove valve cover. Disconnect solenoid wires ((J) Figure 9). Disconnect one wire nut
connection to disrupt power to the valve. Place magic magnet on top cover as if changing activation distance (See Appendix A).
Reconnect solenoid wire connector. Place valve cover back on valve housing, carefully tuck wires into housing. Secure cover
with two screws provided. Reconnect power and check for sensor function.
Soft RESET for Electronics:
1. Remove the battery cover from the battery box.
2. Wait for two minutes.
3. Reassemble.
4. Hold target in front of sensor eye (light should blink once followed by a double blink over a 5 second period).
5. Solenoid will activate when target leaves view.
