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Troubleshooting
Battery-Powered & AC-Powered Flush Valves
Normal Operation: When new batteries are inserted or AC
power is connected or RESET Button is pushed, the lights on
the Printed Circuit Board (PCB) will blink in the following
sequence: Red, Red (with solenoid clicking), Green, Red and
Red. Green light will stay on. When the user enters the sen-
sor beam's effective range, the Red light will flash one time
on battery-operated flush valves and will stay on on AC-pow-
ered models. If the user stays in the effective range for more
than 4 seconds and steps away, the valve will activate (1)
Worn batteries are the leading cause of malfunctions.
PROBLEM - FLUSH VALVE WILL NOT FLUSH
POSSIBLE CAUSE
TO DIAGNOSE
Water does not turned on
Check water supply.
Power supply failure
Check polarity of batteries (or Power
Adapter voltage) and connections.
Batteries are weak
Red indicator light flashes, no click.
Sensor distance is too short
Stand in front of valve to
find focal point of sensor beam.
PC Board does not respond
No light, no action.
Sensor eye does not respond
Red indicator light does not blink.
Sensor eye angle adjustment
Beam not detecting user.
User time in the sensor range
Stand in front of flush valve. The red
is too short
indicator light only flashes once.
Solenoid valve is clogged
Solenoid is clicking, but water does not flow. Clean solenoid and blow free all by-pass holes.
PROBLEM - FLUSH VALVE WILL NOT SHUT OFF
Solenoid coil malfunction
Light blinks but no solenoid clicking.
Solenoid is dirty
Solenoid valve is normally closed.
Clicking sound means the solenoid is dirty.
flush cycle. The flush valve unit will automatically reset for
the next user. When the manual OVERRIDE Button is pushed,
the flushing mechanism will be activated without impacting
the mode of automatic operation. On battery powered mod-
els, the Red indicator light flashes when batteries are low.
Please note: Always push the RESET Button
BEFORE diagnosing any problem and AFTER
taking a corrective action.
REMEDY
Turn water on at valve.
Replace batteries (or Power Adapter).
Push RESET Button.
Replace batteries. Push RESET Button.
To adjust sensor distance out, turn
adjustment screw clockwise. Push RESET Button.
Replace batteries (or Power Adapter).
Replace PCB. Push RESET Button.
Replace batteries (or Power Adapter).
Replace sensor eye and cable. Push RESET Button.
Disassemble control unit, rotate lens up/down
with finger. Push RESET Button.
Stand in sensor range for more than 4 seconds,
then move away. Push RESET Button.
Replace solenoid. Push RESET Button.
Replace batteries (or Power Adapter).
Replace solenoid coil. Push RESET Button.
Replace solenoid valve. Push RESET Button.
AC power adapter
Sensor eye cable
Solenoid pin
pin connector (Red)
pin connector
connection
Sensor distance
adjustment
Indicator light
(Red)
Indicator light
(Green)
Reset button
Dip switch
Sensor Operated Flush Valves
Dip Switch Settings - Push reset button on PC board after any dip switch adjustments
Diagram
Flushing Volume (Time) Water Closet or Urinal
#
Moen Model
Flush Time GPF
1
Urinal Factory pre-set
8315*
1 SEC
2
Urinal Factory pre-set 8312* 8314* 8312R10* 2 SEC
3
Closet factory pre-set
8311*
2.5 SEC
4
Urinal Factory pre-set
8312R15*
3 SEC
5
Closet Factory pre-set
8310* 8313 8310R16*
4 SEC
6
Closet Factory pre-set
8310R35*
7 SEC
* Includes AC models • Pint and Dual Flush models contain non-adjustable PC boards.
1
2
3
4
5
6
ON
OFF
1 Second Flush - 0.5 GPF
3 Second Sensor Arming Time
1
2
3
4
5
6
ON
OFF
2.5 Second Flush - 1.28 GPF
4 Second Sensor Arming Time
1
2
3
4
5
6
ON
OFF
4 Second Flush - 1.6 GPF
4 Second Sensor Arming Time
All flush valves are intended for use with matching flow rates as specified by the fixture manufacturer
Adjusting Settings
Battery holder pin
connector (Red)
Note: Pint and Dual Flush models
contain non-adjustable PC boards.
AC/DC
Switch
Batter holder pin
connector (Red)
Sensor Arming Time
(Sensing Time Required For Flush)
SW 1 SW 2 SW 3 SW 4
SW 5 SW 6 SW 7 SW 8 Arming Time
0.5
ON
ON
ON
ON
OFF
OFF
OFF
1.0
ON
ON
ON
OFF
OFF
OFF
OFF
1.28
OFF
OFF
OFF
OFF
ON
OFF
OFF
1.5
ON
ON
OFF
ON
OFF
OFF
OFF
1.6
ON
ON
OFF
OFF
ON
OFF
OFF
3.5
ON
OFF
OFF
ON
ON
OFF
OFF
7
8
1
2
3
4
5
2 Second Flush - 1.0 GPF
3 Second Sensor Arming Time
7
8
1
2
3
4
5
3 Second Flush - 1.5 GPF
3 Second Sensor Arming Time
7
8
1
2
3
4
5
7 Second Flush - 3.5 GPF
4 Second Sensor Arming Time
ON
3 SEC
ON
3 SEC
OFF
4 SEC
ON
3 SEC
OFF
4 SEC
OFF
4 SEC
6
7
8
6
7
8
6
7
8
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