Troubleshooting guide

Bradley Washfountains Parts and Service Guide
62 Bradley Corporation • 215-1370 Rev. M; EN 08-003
1/7/08
Solenoid Valve Troubleshooting
IMPORTANT: Make sure there is electrical power going to the transformer and there
are 24 volts coming from the transformer.
CAUTION: Turn off electrical and water supplies to unit before troubleshooting.
Problem: Sprayhead drips or fails to shut off.
Cause: There is debris trapped between the diaphragm and the valve seat or a clogged
inlet screen. Refer to solenoid parts breakdown two pages previous to this one.
Solution: Remove debris between diaphragm and the valve seat. Clean the inlet screen.
1. Remove the four screws that secure the clamping plate to the valve body. Be careful not to lose
the armature or spring.
2. Remove the diaphragm and clean it gently but thoroughly. Hold the diaphragm up to a light and
find the small hole which is located about halfway between the inner diameter and the outer
diameter. Make sure the hole in the diaphragm is not plugged.
3. Reassemble the valve in reverse order and test with power from the transformer.
Problem: Sprayhead fails to turn on.
Cause: A failed coil for the valve or improper wiring connection.
Solution: Test the valves and check the wiring connections.
1. Disconnect the wires from the IR module to the transformer and solenoid (refer to wiring dia-
grams for connections).
2. Connect the wire from the transformer to the solenoid valve. Both transformer wires should now
be connected to the solenoid valve which should turn on immediately and run continuously.
• If the solenoid valve does not turn on and you have made sure that there is 24-volt power com-
ing from the transformer, you know that the solenoid has failed and will need to be replaced.
3. After replacing the solenoid valve (if necessary), reconnect the wire from the transformer to the
IR module. Test the solenoid valve again.
• If the solenoid valve does not turn on, check the wiring for proper connections. If it still fails to
turn on, the problem may be in the sensor. Refer to the instructions on Troubleshooting
Adaptive Infrared and follow the sensor troubleshooting procedure outlined there.