Installation Guide

FV838 Rev. A 10/5/2023
Page 10
Problem Indicator Cause Corrective Action
Flushvalvedoesnotush.
Nowaterushed. Stop valve is closed Open stop valve
Sensorashes5timesin
quick succession
Flush cycle did not complete Contact Customer Service for further
instruction
No sensor light
Batteries not making contact
Removeandreinstallbatteriescorrectly,
or replace batteries See Battery
installation for reference.
Critically low battery voltage
Sensorashesonceevery5
seconds
Low battery voltage indication
Sensorashesevery30
seconds
Continuous user detection of object
within sensor range
Recalibrate. See Sensor Range
adjustment section for reference.
Sensorashesrapidly
BatteryPowered:
Batteries installed incorrectly.
Remove and reinstall batteries correctly.
See Battery installation for reference.
Hardwired:
Backup batteries installed incorrectly
Remove and reinstall batteries correctly.
See Battery installation for reference.
Hardwired:
Backup Battery not detected.
Installbackupbatteries,orreference
courtesyush&batterydetection
settingssectiontoturno󰀨backup
battery detection.
Sensordetectsuser,three
slowashes&twoquick
ashs,butfailtoushupon
exiting sensor range
User/objectstillinsensoreld
Identifyandremoveanyuserfrom
sensoreld
Reduce sensor range distance (see
Sensor Range Adjustment instructions)
Battery power level too low to activate
ushvalve
Replacebatteries.SeeBatteryInstalla-
tion 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; no LED
ashes.
Sensor range may need to be adjusted Increasesensorrangedistance(see
Sensor Range Adjustment instructions)
Flush valve is aimed at an angle. Rotateushvalveheadtobe
perpendicular to wall. See Sensor
Angle Adjustment section for adjusting
theushvalvehead.
Manual override button does
notinitiateaush.
Stopvalveisclosed/turnedo󰀨. Turn on stop valve.
MOB does not depress Contact Customer Service.
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 25psi.
Insu󰀩cientvolumeforinstalledxture Contact Customer Service.
Valveshutso󰀨tooquicklyor
shortushes.
Damaged or punctured diaphragm. Installnewdiaphragmreplacement
kit. (See Diaphragm Replacement
and Cleaning Section for replacement
instruction)
Enlargedby-passorice. Installnewdiaphragmreplacement.
(See Diaphragm Replacement and
Cleaning Section for replacement
instruction)
Diaphragm kit is not matched to the
xture.
Installnewdiaphragmreplacement
kit. (See Diaphragm Replacement
and Cleaning Section for replacement
instruction)
Trouble Shooting Guide