
Installation SS-2N/ndt/STD, SS-2N/ndt/WH
Bradley • 215-1576 Rev. K; ECN 17-08-026 5/15/2018 11
Troubleshooting – ndt Components
Problem Cause Solution
Water will not
shut off.
Water
pressure is
too low.
Test for proper water pressure.
The Express Lavatory Systems operating specifications require a water pressure of between 20- 80 PSI at the
connection to the fixture. If the pressure is above 80 PSI the valve may not operate. When verifying water pressure
always use a reliable pressure gauge at the connection to the fixture.
Faulty
solenoid
valve.
Test station; replace solenoid valve if required.
1. Disconnect the plug from the power management module to the circuit board of the problem valve. Remove the
three #8 Phillips-head screws that hold the solenoid valve assembly together. Be careful not to lose the armature
or spring.
2. Remove the diaphragm. Remove any particles that are trapped between the diaphragm and the valve seat.
Rinse off the diaphragm and inspect for damage. Make sure the center orifice and both small side orifices are
open.
3. Reassemble in reverse order, being careful not to over tighten the Phillips-head screws or the plastic valve
body may crack. Tighten until the armature plate makes contact with the plastic body.
4. Reconnect the power plug. Turn on water supply to the unit.
Water in
multiple
stations will
not activate.
Inadequate
lighting.
Test for adequate lighting.
NDITE technology requires a minimum of 400 LUX to operate. Before proceeding make sure all of the lights in
the room are operating and that there are no obstructions blocking the light hitting the surface of the sprayhead. If
available, use a light meter to measure the amount of light on the surface of the Lavatory System sprayhead. Also
check for severe vandalism or other physical damage to the sprayhead. If there is inadequate lighting available in
the location where the unit is installed, add additional lighting. If additional lighting is unavailable, the system may
be converted to battery power. Contact Bradley and order Battery Pack Kit S45-2083 (one per station).
Improper
water
pressure.
Test for proper water pressure.
The Express Lavatory Systems operating specifications require a water pressure of between 20- 80 PSI at the
connection to the fixture. If the pressure is above 80 PSI the valve may not operate. When verifying water pressure
always use a reliable pressure gauge at the connection to the fixture. If water pressure is high but not above 80
PSI the following may be raising the pressure: circulation system , booster pumps orundersized or no expansion
tank. If any of this equipment is raising the pressure above the specified pressure levels it will be characterized by
the system working for a short time after the supply connections are made and then stopping.
No power to
the sensor
board.
Check for power to the sensor board.
1. Remove the front cover from the fixture.
2. Wave your hand in front of the sensor window, one station at a time, while looking at the sensor boards below
the fixture. A light should flash on the sensor board when each station is activated.
3. If no light flashes, test the output from the photovoltaic cells with a multimeter (available from most home
improvement stores and professional supply distributors).
Improper
output from
voltaic cells.
Test output from photovoltaic cells.
1. Test the output from the photovoltaic cells with a multimeter (available from most home improvement stores
and professional supply distributors).
NOTE: The electrical system on NDITE powered Lavatory Systems is low voltage and low amperage.
2. With the room lighting on, unplug the cord running from the photovoltaic cells to the power management
module. Touch the red multimeter probe to the red side of the plug and the black multimeter probe to the black
side of the plug. With the Multimeter in the DC Volts setting, it should have a reading of 6 volts or more. If the
reading is under 6 volts, doublecheck the room lighting levels. If the reading is over 6 volts and the system will
not operate, replace the NDITE power management module.
Water in one
station will not
activate.
Faulty sensor
eyes.
Test sensor eyes and replace, if necessary.
Disconnect the sensor cable from the circuit board of the problem valve. Disconnect the sensor cable from
the circuit board of an adjacent working valve. Connect the sensor cable from the adjacent working valve to
the problem valve. Activate the problem station’s sensor. The station should turn on. If it turns on and cycles
normally, replace the eyes in the problem station.
Problem
with control
boards.
Test the control boards and replace the battery, if necessary.
Disconnect the plug from the power supply to the circuit board of the problem valve. Disconnect the plug from
the power supply to the circuit board of a working adjacent valve. Connect the power plug from the adjacent
working valve to the problem valve. Wait for ten seconds. Activate the problem station’s sensor ten times. The
station should turn on. If it turns on, and cycles normally, replace the batteries in the problem station.
NDITE technology requires a minimum of 400 LUX to operate. Before proceeding make sure all of the lights in the room are
operating and that there are no obstructions blocking the light hitting the surface of the sprayhead. If available, use a light
meter to measure the amount of light on the surface of the Lavatory System sprayhead. Also check for severe vandalism or
other physical damage to the sprayhead.
Leave the lights in the room on for aproximately four hours to fully charge the system before operating. If there is
inadequate lighting in the location where the unit is installed, add additional lighting or convert the system to battery
power. Contact Bradley and order Battery Pack Kit S45-2083 (one per station).