FV454 Rev C 1/28/13
Page 5
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.
Valve leaks
LED flashes every 30
seconds.
Valve operates back-
wards.
Possible Cause
Valve could be sensing a
close by surface or reflections
from some opposite surface.
Lens could be dirty or dam-
aged.
Solenoid lead disconnected,
reversed or broken wire.
Battery corrosion has caused
loss of contact.
Sensor not detecting user.
Electronics fault
Sensing range too short.
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.
Low battery voltage
Solenoid connector not
properly aligned.
Diagnosis
Hold a flat object at an acute
angle to the valve and see if it
flushes ( three ring binder
works well)
Visual inspection of lens.
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
Hold hand close to lens to see
if it will produce the 4 flash/2
flash pattern.
Close stop, disconnect valve,
crack stop to check for water.
Close stop, remove and
inspect filter.
Check stop screw.
Check solenoid leads and
insertion of solenoid plug.
Remove solenoid and inspect
diaphragm and plunger.
Visual inspection.
Remove solenoid and inspect
diaphragm and plunger.
Check for leak location.
Check for cuts.
Solution
Reduce sensing range
Eliminate reflective
object.
Clean or replace if
obstructed or damaged
Reinsert plug or repair
leads
Replace batteries and
clean or replace battery
housing.
Reset sensor range
(Appendix A)
Reset range.
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
Replace batteries
Reconnect plug properly.
Electronics Reset Procedure
: Remove battery cover (J) Figure 7). Allow electronics to set for a minimum of 4 minutes.
Resecure the battery cover and gasket with screw provided. Reconnect solenoid wire connector. Place top cover assembly
back on valve housing, carefully tuck wires into housing. Secure cover with two screws provided.
