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Maintenance continued…
12.8 Solenoid valves
If water continues to flow
when the tap should be off, and if the sensor is correctly ranged, then the
solenoid valve may have debris lodged in the diaphragm pilot hole or on the valve seat:
• Locate the solenoid valve.
• Isolate the water supplies.
• Disconnect the solenoid valve cables.
• Remove the 3 screws holding the coil.
• Lift off the coil assembly.
• Locate the diaphragm
(inside the valve body).
• Clean out the pilot hole(s) – use a
thin gauge fuse wire (or similar).
• Ensure there is no debris on the diaphragm
or the valve seat (under diaphragm).
• Re-assemble solenoid valve.
• Reconnect water supply, check there are no leaks.
• Reconnect the solenoid valve cables.
• Test the solenoid valve & ensure it is working correctly.
If diaphragm is damaged it should be replaced.
If the solenoid plunger
becomes dislodged from its
bore,
ensure it is refitted
correctly. The end with the
small black insert should
face towards the diaphragm.
Incorrect assembly will cause continual running.
FLOW
DIRN
Diaphragm
pilot hole(s)
