47
10.Why won’t the system turn on, even though
the thermostat display is functioning nor-
mally?
Either the compressor lockout feature is in op-
eration or the thermostat is not currently calling
for heat or cool. Wait about 5 minutes for the
compressor lockout to expire. If the system is still
not running, read the cautionary statement be-
low. Then, if conditions permit, use the or
buttons to move the temperature above or
below the setpoint temperature. See OPERAT-
ING YOUR THERMOSTAT.
If the outside temperature is below 50
°F, DO
NOT use
or to move the tempera-
ture above or below the setpoint tempera-
ture. Property damage may result due to
compressor slugging.
11.Why doesn’t the temperature change at the
time I programmed?
There may be a number of causes for this situa-
tion. The following are primary reasons.
• The EMR function is operating. The EMR
function will automatically bring on the sys-
tem automatically to bring the temperature
to the selected level by the beginning of the
next program period. See OPERATING
YOUR THERMOSTAT.
• You have programmed the incorrect day or
time. Check your programming (be sure that
the times you programmed are correct AM
or PM times). See PROGRAMMING YOUR
THERMOSTAT.
• The thermostat is in the HOLD mode. Press
RUN
PRGM
to start program operation. See OP-
ERATING YOUR THERMOSTAT.
CAUTION
!
