Product Manual — Doc. 9368A DIN-1TSTAT8 • 17
Failsafe Mode
Failsafe mode ensures that an appropriate heat level is maintained in each zone if the stored
setpoint becomes corrupt or if no control system is connected. When the thermostat enters
Failsafe mode, the temperature setpoint for all zones is set to the failsafe setpoint.
Establish the failsafe setpoint in the control system program. The failsafe setpoint can range
from 5ºC (41ºF) to 20ºC (68ºF); the default failsafe setpoint is 20ºC (68ºF). Temperate zones
can use a lower failsafe setpoint and cold climates may use a higher value.
The thermostat exits Failsafe mode after it reestablishes communication with the control
system or if the stored setpoint is restored. The thermostat resumes normal operation according
to its last known state.
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