IF. .
Display will not come on.
THEN. .
n
Check that heat or cool system power is on. If you use batteries,
replace with fresh ones.
n
Make sure thermostat is correctly mounted on subbase.
Display
flashes during programming.
n
YOU have reached the temperature setting limit. The setting range is
45’F to 88°F. In models with automatic heat-cool changeover, the
COOL temperature setting must be at least 3°F above the HEAT
temperature setting.
Display flashes during operation.
Program is lost due
to power outage.
Temperature change occurs
at the wrong times.
Heating will not come on.
n
Programming has been lost because ofa power outage. You must
reprogram.
. Check that backup batteries are installed correctly. Replace if
necessary. Reprogram the thermostat.
m Check the program times for the period in question. Be sure that
AM and PM indications are correct. Make sure the current day and
time are correct. Reprogram if necessary
n
Remember that the heating system or cooling system comes
on
before the WAKE and RETURN start times so the house will be at
the desired temperature when the period starts.
n
Checkthefuseorcircuitbreakerand replaceorresetifnecessary.
n
Check that switch on thermostat is set to HEAT or AUTO.
33
. The:thermostat has a built-in time delay, which may add to time
delays in th&cooling e$juipment. Allow up to 10 minutes after
changing the setting before the compressor starts.
n
,If temp@ure setti@is’lower than current:temperature, and dis-
,,play $8)~ COOL ON
qi
SYSTEM Iight’iS on, contact your heating
and air conditioning contractor.
The building is too
n
Press ~PRESENT SETTIN& to check, the current temperature
warm or too cool.
setting.
. If desired, change the time or tem@rature setting. See page 19.
Display says HEAT ON or system
. Allbwiime forthe heating equipmentto heat up before checking for
light is on, but no,heat is coming
heat at the register. ,,~
from the registers.
Display tlsshes,REPL~~A~, or goes
blank,when @tier:& turned
o!.
‘:
~,~,~~stalJ, fresh A&:alk$ne ,t+tteries (Seem page ,271.
,,: ,,,,, ‘,,:,~,,~ ~,
34
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