Toto USWN900 Series Instruction Manual And Warranty page 23

Water is not flushed (Dry Type)
When the detection indicator LED is flashing, or you do not know whether
it was flashing
(1) Check the connection of the
backup battery connector.
(2) Open the master valve and
shutoff valve.
* If water is still not flushed, close the shutoff valve with a flat-head screwdriver,
and request repair from your installer or seller.
Backup battery
Flat-head
screwdriver
Detection LED
Connector
Open Close
Shutoff
valve
23