TCP Smart ‎TBUWTRVZIG Quick Start Manual page 20

Settings - Child lock
You can turn child lock
on in the settings tab
or manually by holding
down the LCD screen
for 3 seconds. When
the child lock function
enables, all operations
on the thermostat will
be invalid to prevent
children from playing
with the thermostat or
mis-operation because
of curiosity, A padlock
symbol will be shown on
the LCD screen. Repeat
the process to unlock.
Settings - Week program
You can set a weekly
schedules in the settings
tab.