Express
®
Lavatory System - MG-Series with TouchTime
®
Control
MG-2/TT
Installation
18
4/9/2014
Bradley
• 215-1480 Rev. G; ECN 13-08-025
Troubleshooting Solenoid Valve (VAC)
CAUTION: Turn off electrical and 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 Figure 13 on page 19).
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 on page 12.
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. Pass your hand in front of the sensor of the problem
station, and 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 electrical and water supplies to the unit;
• pass your hand in front of the sensor. If the station still fails to turn on, replace the sensor
(see page 19).
Troubleshooting – Stop Valve
Problem
Cause
Solution
Water just
dribbles or does
not flow from
sprayhead
Water supply malfunctioning
1. Close the stops and check the valves that supply water to
the lavatory system.
2. Inspect the stop valves for proper installation.
Water sprayhead
delivers all hot or
cold water
Water supply or mixing valve
malfunctioning
1. Close the stops and check the valves that supply water to
the lavatory system.
2. Inspect the stop valves for proper installation.
3. Inspect mixing valve for proper hot and cold installation. A
red marking indicates the hot inlet.
