F533 Rev. A 1/13/11
Page 5
TROUBLE SHOOTING GUIDE
Problem
Valve does not flush:
Valve does not shut off:
Indicator
1.) Sensor flashes continu-
ously when user steps within
range.
2.) Red light in the sensor
does not flash when user
steps within the sensor’s
range.
3.) Red light in the sensor
flashes when the user steps
within the sensor’s range.
1.) Sensor flashes when user
steps withing the sensor’s
range.
2.) Red light in the sensor
does not flash when user
steps within the sensor’s
range.
Cause
1.) Low battery.
1.) Range is too short
2.) Range is too long
3.) Battery is completely used
up.
4.) Sensor is picking up
reflections from the mirror or
other objects.
1.) Connectors between the
electronic unit and solenoid
are disconnected.
2.) Debris or scale in solenoid.
3.) The water supply pressure
is too high.
1.) Debris or scale in piston.
2.) Sensor is dirty or covered.
3.) Sensor is picking up
reflections from mirror or
another object.
Solution
1.) Replace battery.
1.) Increase the range.
2.) Decrease the range.
3.) Replace battery.
4.) Eliminate cause of
reflection.
1.) Connectors of the
electronics to the
solenoid.
2.) Unscrew solenoid,
pull out the plunger and
spring from solenoid and
clean them. Use scale
remover material if
needed. When replacing
the plunger, make sure
spring is in a vertical
position.
3.) Reduce the water
supply pressure.
1.) Clean the piston and
the orifice or replace kit.
2.) Clean or eliminate
case of interference.
3.) Decrease the range
or eliminate cause of
reflection.
Figure 13
