Bradley MF2922 - Manual (Page 22)

Terreon ® Multi-Fount Washfountains
Parts and Service Guide
22 Bradley Corporation • 215-1447 Rev. F; EN 07-005A 1/30/2008
TouchTime (TT) Solenoid Valve Troubleshooting
CAUTION: Turn off water supplies to unit before troubleshooting.
Problem: An individual operating station fails to shut off and drips.
Cause: There is debris trapped between the diaphragm and the valve seat.
Solution: Remove debris between diaphragm and the valve seat.
1. Remove the three #8 Phillips-head screws that hold the solenoid valve assembly together. Be
careful not to lose the armature or spring (see previous page).
2. Remove the diaphragm. Remove any particles that have been 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 overtighten the Phillips-head screws or you
may crack the plastic valve body. Tighten until the armature plate makes contact with the plastic
body.
4. Reconnect the wiring per diagram.
Problem: An individual operating station fails to turn on.
Cause: A failed coil for the valve or loose electrical connection to the terminal.
Solution: Test the station to determine cause.
1. Disconnect the wires from the coil of an adjacent valve. Disconnect the wires from the problem
valve and reconnect to the adjacent valve.
2. Turn on electrical and water supplies to the unit. Depress the Touch Time pushbutton of the
problem station, the adjacent station should turn on.
If the adjacent station turns on and cycles normally, replace the coil on the problem valve.
If the adjacent valve fails to turn on, inspect the wires from the sensor cable and do the following:
• make sure there are no breaks and that the fully insulated disconnect terminals are firmly
crimped in place;
• turn off the electrical and water supplies;
• reconnect to the adjacent valve and turn on the water supplies to the unit;
• depress the Touch Time pushbutton. If the station still fails to turn on, replace the sensor.