41
Symptom
Problem
Solution
LOCKED appears
on LCD and
heating or cooling
will not operate.
This is not a fault.
Outside air temperature too high
to require heating.
Outside air temperature too low
to require cooling.
Heating and/or cooling disabled
to conserve energy. The heating
or cooling function can be
disabled when the outside
temperature is warm or cool
enough to not warrant the use of
the A/C system.
Fan speed
changes
frequently.
This may not be a fault.
Your thermostat is choosing the
most energy efficient fan speed
for the current conditions.
Try selecting a speed manually
with the fan button.
Thermostat has
no display.
Check air conditioning main fuse. Reset home fuse.
Call Technical Services.
Faulty wiring, fuse or thermostat. Call Technical Services.
Summary of Contents for SMART 2000
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