FV669 Rev. G 06/22/22
Page 11
Problem
Indicator
Cause
Corrective Action
Flush valve does not flush.
No water flushed.
Stop valve is closed
Open stop valve
Sensor flashes every half a
second
Complete flush cycle not detected
Contact Customer Service for further
instruction
No sensor light
Batteries not making contact
Remove and reinstall batteries correctly.
or replace batteries See Battery
installation step 4 for reference.
Sensor flashes every 3
seconds
Critically low battery voltage indication
Sensor flashes every 10
seconds
Low battery voltage indication
Sensor flashes every 30
seconds
Continuous user detection of object
within sensor range
Sensor detects user but fail
to flush upon exiting sensor
range
User/object still in sensor field
Identify and remove any user from
sensor field
Reduce sensor range distance (see
Sensor Range Adjustment instructions)
Battery power level too low to activate
flush valve
Replace batteries. See Battery Installa-
tion step 4 for reference.
Dirty sensor lens
Clean sensor lens with warm water and
mild soap until free of debris
Loose or damaged wire harness
Inspect wire harness and connection
between electronics and motor
User not detected.
Sensor range may need to be adjusted
Increase sensor range distance (see
Sensor Range Adjustment instructions)
Flush valve is aimed at an angle.
Rotate flush valve head to be
perpendicular to wall. See Sensor
Angle Adjustment section for adjusting
the flush valve head.
Manual override button does
not initiate a flush.
Battery power level too low to activate
flush
Replace batteries. See Battery Installa-
tion for reference.
Valve does not evacuate
fixture
Insufficient volume of water to
adequately siphon fixture.
Stop valve is not open enough.
Open stop valve for desired volume of
water.
Insufficient volume or pressure at
supply.
Increase incoming water supply
pressure to minimum 25psi.
Valve shuts off too quickly or
short flushes.
Damaged or punctured diaphragm.
Install new diaphragm replacement
kit. (See Diaphragm Replacement
and Cleaning Section for replacement
instruction)
Enlarged by-pass orifice.
Install new diaphragm replacement.
(See Diaphragm Replacement and
Cleaning Section for replacement
instruction)
Diaphragm kit is not matched to the
fixture.
Install new diaphragm replacement
kit. (See Diaphragm Replacement
and Cleaning Section for replacement
instruction)
Trouble Shooting Guide
