
FV722 Rev. A 07/23/20
Page 10
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PROBLEM INDICATOR POTENTIAL CAUSE SOLUTION
Valve does not
ush
No lights on sensor board Baeries not making contact Remove and reinstall baeries correctly - See
step 5A for reference
Baeries reversed polarity
Sensor ashes (red) every 10
seconds Low baery voltage indicaon Replace baeries - see Step 5A for reference
Sensor ashes (red) every 30
seconds
Connuous target detecon of object within
sensor range
#1 Inspect and clean lens
#2 Idenfy and remove any target from
sensor eld
#3 Reduce sensor range distance (see page 10
for Sensor Range Adjustment instrucons.
Sensor detects user but fails to
ush upon exing sensor range
Baer power level too low to acvate full
ush - sensor board automacally shuts down
to avoid open ush
Replace baeries See Step 5A for reference
D
irty sensor lens Clean lens unl free of debris
Loose or damaged solenoid connecon Inspect connecon between solenoid and
sensor for proper inseron - step 4
No target detected Install environment may require adjustment
of the sensor range from the factory sengs
Re-calibrate sensor range - see Sensor Range
Adjustment (Figure 28) page 10
Valve does not shut
o water (connuous
ow)
Normal target detecon
Water pressure either too high or too low
Adjust water pressure to recommended
range:
35 to 80 psi running water pressure
Piston and / or solenoid plugged or damaged
Remove Piston and / or Solenoid to examine
for damage or plugging.
Clean piston / solenoid orice if plugged.
Replace solenoid kit if solenoid diaphragm is
damaged.
Low or no power allowing solenoid to move
to open posion but not enough power to
return to closed posion.
Replace baeries or restore power if
hardwired.
MOB (mechanical override buon) scking in
open posion Replace MOB.
Valve ows low
(short ushing) Valve does not evacuate xture
Tailpiece lter is clogged with debris
#1 Turn stop o
#2 Remove valve from stop and xture
#3 Inspect/clean lter (see parts breakdown -
Part number 10)
Piston orice is enlarged Replace piston
Flush valve rang does not match xture ush
rang
Replace ush valve to match xture ush
rang
Ghost ushing Flush valve acvates without
target present.
Highly reecve environment Re-calibrate sensor range - see Sensor Range
Adjustment
Sensor range set too far, picking up other
objects.
Connuous ushing Valve ushes every 30 seconds. Magnet stored in sensor cap. Remove magnet from sensor cap. Do not
store magnet in ush valve.
Electronic Control
Board
Cannot adjust sensor range Processor latched
Reset electronics module by removing cap,
disconnect power connector and shorng
terminals together. Reconnect power,
allowing 30 seconds to complete power up
sequence.
DIP switch sengs Conguraon changes to DIP switches
Remove cap from valve and disconnect
power. Move DIP switch to desired posion.
Reconnect power, allowing 30 seconds to
complete power up sequence.
Flush Valve Trouble Shooting Guide