
Combination failure (power failure & low battery).
The programmable thermostats with battery backup also will indicate a combination failure; that is, both a low battery condition as well as a power failure condition. After the power is restored, the following may be indicated:
Combination failure, Off mode
The thermostat will display a low battery indication, as well as a power failure indication (“12:00”). The display will toggle between the low battery screen and the “12:00” screen.
Combination failure, Cool mode
The thermostat will display a low battery indication, as well as a power failure indication (“12:00”). The display will toggle between the low battery screen and the “12:00” screen
Combination failure, Heat mode
The thermostat will display a low battery indication, as well as a power failure indication (“12:00”). The display will toggle between the low battery screen and the “12:00” screen
OFF
OFF PM
COOL
COOL
PM
HEAT
PM
HEAT
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