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has expired. You can check the duration run time and clear it by following step
1. Press MENU button for displaying main button
2. Press OTHER button for displaying other button
3. Press INFO to inquiry for the UV duration time. If displays shows the counter back time of filter
change replacement. Press INFO again, UV duration time will appear.
4. When “Chg UV” is displayed, RESET button will be shown when inquiry for UV lamp duration
time. Press RESET and then press DOWN to reset the timer. This resets the timer and starts
counting the duration days
19. Selection of time scale
Select 12 for 12 hours display for time clock and select 24 for 24 hours display for time clock
20. Remote sensor option
0: No remote sensor
1: Outdoor sensor (display only).Assuming 1 is selected, if an optional outdoor sensor is installed,
INFO will display in Home screen. Press INFO for inquiry for the outside temperature.
2: Outdoor control sensor (See Menu item 21 Heat pump temperature lockout)
3: Indoor sensor. If 3 is selected and the thermostat is installed with an indoor remote sensor, display
will show the read temperature from the indoor sensor.
21. Heat pump compressor lockout temperature
This option apply only to HP1 HP2 setting in system type option and only works when remote sensor
option (menu item 20) is set 2.
0: No heat pump compressor lockout
15,20,25,30,35,40℉: heat pump compressor lockout temperature
With fossil-fuel backup (See menu item 3.Auxiliary heat type option). If the thermostat is installed
with an optional outdoor sensor, you can select the compressor lockout temperature. When the outdoor
temperature is below the compressor lockout temperature, only the auxiliary heat operates. When the
outdoor temperature is above the compressor lockout temperature, only the compressor operates.
With electric heat back up (See menu item 3. Auxiliary heat type option). If the thermostat is
installed with an optional outdoor sensor, you can select the compressor lockout temperature and /or an
auxiliary heat lockout temperature. (See menu item 22) When the outdoor temperature is below the
compressor lockout temperature, only the auxiliary heat operates. When the outdoor temperature is above
the auxiliary lockout temperature, only the compressor operates. If the outdoor temperature is between the
compressor and auxiliary lockout temperatures, both the compressor and auxiliary heat can operate.
22. Heat pump auxiliary heating temperature lockout option
This option apply only to HP1 HP2 setting in system type option and only works when remote sensor
option (menu item 20) is set 2.
0: No auxiliary heating temperature lockout
40,45,50,55,60℉: heat pump auxiliary heating temperature lockout. ( See menu item 22 explains how
it work)