
FV696 Rev. B 07/29/20
Page 9
Troubleshooting: ZEMS-IS-W1 Flush Valve
Problem Possible Cause Corrective Action
Connect the wires.
Sensor lens is dirty. Clean lens.
The infrared sensor or the actuator is out
of order.
Contact distributor for replacement.
Sensor is faulty.
Replace sensor.
Replace power supply.
Sensor does not recognize a user.
Power supply is disrupted.
Replace urinal piston with proper closet piston.
pressure for satisfactory performance.
Trip mechanism not seating properly due to
foreign material between trip mechanism and seat.
Disassemble parts and rinse thoroughly.
mechanism to seal.
range. Steps should be taken to increase the line pressure.
Water splashes out of
Flush is not considered
Fixture is contributing to noise.
Piping system is source of noise. High pressure in the system can sometimes be controlled by the stop
shock arrestors, loose pipes, improper size pipes, etc. In these cases
the building engineer should be consulted.
no user present.
Sensor lens is dirty. Clean lens.
Power supply output is out of tolerance.
Diaphragm Valves
Damaged diaphragm.
Piston Valves
Damaged piston.
Diaphragm Valves
Replace urinal diaphragm with proper closet diaphragm.
Piston Valves
Replace urinal piston with proper closet piston.