Hi I’m Vance and welcome back to Repair and Replace.
In this episode, I'll show you how to troubleshoot some common problems in a Toto Ecopower Flushometer.
Flushometers or flush valves, are just automatically timed, self-closing valves.
At rest, water is at equal pressure in the upper and lower chambers.
This keeps the piston closed tightly on the valve seat.
When the sensor is triggered, the solenoid activates and releases water from the upper chamber,
which decreases the pressure.
High pressure water from the inlet now lifts the piston up and travels down the flush pipe.
As the water flows through the micro turbine, electric power is stored in the capacitor
which is used to power the system.
During the flush, some of the water is forced back into the upper chamber
through a small bypass hole in the piston.
The flush continues until the pressure equalizes,
and pushes the piston down onto the valve seat.
Over time the rubber seals on the piston deteriorate
which can cause water from the upper chamber to leak.
This might prevent the upper chamber from pressurizing.
If the piston is stuck in the raised position, it can also cause continuous flushing.
Another cause can be the solenoid.
If it is stuck open, water continues to flow out
and will prevent the upper chamber from pressurizing.
You can watch these repairs in the videos linked below.
If the unit isn't flushing automatically, then press the manual override button.
If it doesn't flush manually, then check the control stop to see if the water is on,
and clean or replace the piston assembly.
Now if the valve flushes manually but doesn't flush automatically
then check all the cable connections.
If the connections are good, and it still doesn't flush automatically,
then replace the solenoid.
If you replaced the solenoid and the valve still doesn't flush then replace the sensor module.
Watch the videos linked below for more detail
If there is not enough water to properly flush the bowl, then first check the water supply.
Open the control stop until you get a normal flush and a quiet operation.
Since water flow rate is dependent on the pressure; the pipe size, length and number
of fixtures in the building can all affect the flow rate of each flush.
Now if needed the regulating screw can be adjusted.
Turn the screw a half turn counterclockwise, and test the operation
until the flush volume is increased to a normal level.
If there is an excessive amount of water flowing during each flush
then first check the water supply.
Close the inlet stop valve all the way and then open it one complete turn.
The regulating screw can also be adjusted to decrease the volume.
Turn the screw a half turn clockwise, and test the operation
until the flush volume is increased to a normal level.
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