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507518-02
Service Reminder
The SERVICE indicator is displayed only under the
following conditions:
S if the thermostat Y1 terminal has been activated with
24VAC for at least 5 minutes, AND the L terminal is
shorted to the R terminal;
OR
S if the thermostat Y1 terminal has been activated with
24VAC for at least 5 minutes, AND the L terminal is
shorted to the C terminal.
Power Loss/Recovery
Thermostat memory is retained for a minimum of 24 hours
during a power loss (includes retention of program
information, HOLD status, programmed temperature set
point, heat/cool and fan mode settings, filter reminder
status, maintenance reminder status, and equipment
protection timers). After 24 hours of power loss,
programmed settings will be lost and replaced with default
settings.
IMPORTANT
Power must be applied for at least six consecutive hours
prior to a power loss in order for memory to be retained for
the specified time.
LCD Back Light
Activated for 30 seconds when any button is pressed.
NOTE - During an electrical storm or similar disturbance,
the back light may activate for a few seconds. This is normal
and will no longer occur after the electrical disturbance has
passed.
Thermostat Operating Conditions
32°F to 122°F, 10% to 90% RH
Thermostat Storage Conditions
-40°F to 176°F, 10% to 90% RH
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