White Rodgers 1F90-71 操作ガイド
30
the normal program function. See PRO-
GRAMMING YOUR THERMOSTAT.
GRAMMING YOUR THERMOSTAT.
4.
What happens if the electricity goes off
or is manually shut off?
or is manually shut off?
If you have not installed 3 “AA” alkaline
batteries, the display will go blank and the
program will be lost in approximately one
minute. When electricity is restored, the
clock will reset itself to 12:00 PM (noon) and
the thermostat will maintain a heating tem-
perature of 64
batteries, the display will go blank and the
program will be lost in approximately one
minute. When electricity is restored, the
clock will reset itself to 12:00 PM (noon) and
the thermostat will maintain a heating tem-
perature of 64
°
F and a cooling temperature
of 82
°
F until you reenter your program.
Setpoint temperature will not be displayed.
If fresh “AA” Energizer
®
alkaline batteries
are installed, the program will be main-
tained for about one year with no 24 VAC
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
tained for about one year with no 24 VAC
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
5.
Why can’t I program the thermostat in
the AUTO mode?
the AUTO mode?
The thermostat can only be programmed in
the HEAT and COOL modes. See PRO-
GRAMMING YOUR THERMOSTAT.
the HEAT and COOL modes. See PRO-
GRAMMING YOUR THERMOSTAT.
6.
What can cause the thermostat display
to freeze or go blank?
to freeze or go blank?
A completely blank display may indicate
that power has been lost to the thermostat
and the backup battery is also dead. How-
ever, if there is power to the thermostat and
the display is blank or frozen, static dis-
charge is probably the cause.
that power has been lost to the thermostat
and the backup battery is also dead. How-
ever, if there is power to the thermostat and
the display is blank or frozen, static dis-
charge is probably the cause.
During periods of low humidity (especially
during cold weather), you may feel or see a
spark discharge when you touch the ther-
mostat. This may cause the program to be
lost or the thermostat to display incorrectly.
during cold weather), you may feel or see a
spark discharge when you touch the ther-
mostat. This may cause the program to be
lost or the thermostat to display incorrectly.