Installation Guide

FV669 Rev. B 10/14/2019
Page 9
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Problem Indicator Cause Corrective Action
Valve does not evacuate
xture
Insu󰀩cient volume of water to
adequately siphon xture.
Stop valve is not open enough. Open stop valve for desired volume of
water.
Insu󰀩cient volume or pressure at
supply.
Increase incoming water supply
pressure to minimum 35psi.
Valve shuts o󰀨 too quickly or
short ushes.
Damaged or punctured diaphragm. Install new diaphragm replacement kit.
(See page 6 for replacement instruction)
Enlarged by-pass orice. Install new diaphragm replacement.
(See page 6 for replacement instruction)
Diaphragm kit is not matched to the
xture.
Install new diaphragm replacement kit.
(See page 6 for replacement instruction)
Valve is ushing too long or
not shutting o󰀨.
High water delivery or
continuous ow.
By-pass orice is plugged or partially
plugged.
Examine by-pass orice and clean if
necessary being certain not to enlarge
orice opening. (See page 6 for cleaning
instruction)
Water splashes out of xture.
Water splashes onto oor
during ush cycle.
Supply volume is too high. Slowly close the control stop to lower
water pressure.
Mineral accumulation on vortex or
spreader holes of xture.
Remove the mineral build up.
Flush is not considered quiet. Flush is loud.
Control stop may not be adjusted for
quiet operation.
Adjust the control stop for quiet opera-
tion keeping in mind the xture evacua-
tion requirements.
Fixture may be contributing to noise. Check noise created by xture by
placing a cover over the bowl opening to
separate valve noise from bowl noise. If
it is determined the xture is too noisy,
consult with xture manufacturer.
Piping system may be source of noise. High pressure in the system can
sometimes be controlled by the stop
valve. Other sources of noise may be
the absence of air chambers and shock
arrestors, loose pipes, improper size
pipes, etc. In these cases the building
engineer should be consulted.
Valve leaking near valve head. Water droplets seen between
valve head and valve body.
Locking ring not tight. Tighten locking ring. See Sensor Angle
Adjustment section for reference.
Valve ushed with no user
present
Valve ushed with no user
present
Highly reective environment
Re-calibrate sensor range - see Sensor
Range Adjustment section (page 7)
Sensor range set too far; picking up
other objects
Flush valve may be congured to
exchange the water in the trap-way at
every [24 / 48 / 72] hours after no usage
(default is OFF).
See page 7 for instructions on changing
dipswitch settings to achieve desired
trap exchange timing.
Trouble Shooting Guide