Use and Care Manual

17
RTH8500 Series
Setting the date
1 Touch Menu on the thermostat home
screen.
2 Touch the or arrows until you
see DATE, then touch Select.
3 Touch or to set the month, then
touch Select to confirm.
4 Continue to set day and year in the
same way. Touch Select to save your
changes.
Back Select
Back Select
To select a temperature scale, follow the
steps below.
1 Touch Menu on the thermostat home
screen.
2 Touch the or arrows until you
see TEMP SCALE, then touch Select.
3 Touch the or arrows to select
FAHRENHEIT or CELSIUS then
touch Done to save your changes.
4 Touch Back to return to the
thermostat home screen.
Choosing Fahrenheit or Celsius
Back Select
Done
Cancel
Recovery
Number Alert/Reminder Definition
170 Internal Memory Error The memory of the thermostat has encountered an error. Please replace the
thermostat.
173 Thermostat Temperature
Sensor Error
The sensor of the thermostat has encountered an error. Please replace the
thermostat.
181 Replace Air Filter (1) Replace air filter (1). Reset the timer by touching the "dismiss" button on
thermostat screen after it is replaced.
405 Low Battery Alert The batteries are getting low. Replace them within two months.
407 Critical Low Battery The batteries are almost depleted and should be replaced as soon as
possible.
Alerts and maintenance reminders
1 Touch Menu on the thermostat home screen, then you’ll see the ALERTS sub-
menu. (The ALERTS sub-menu will only be available when there’s an active
alert.)
2 Touch Select to view the alert. A 3-digit alert code will appear by the
thermostat’s clock and a description of the alert will scroll on the screen.
3 If the alert is non-critical, you’ll have the option to Snooze or Dismiss it. If you
have multiple alerts, touch the
or arrows to page through the list of active
alerts and follow steps 1 and 2 above.
To see what each 3-digit alert code means and the action you should take, refer to
the chart below.