Bosch BCC100 User Manual page 21

Please note that your device is always running on a
programmed schedule and the current operating mode is
part of that schedule. Thus, when you change the Mode,
it will only change the mode for the current program. If
you change to a different program, your Mode will follow
the new program that you
have selected.
The mode selection is for the
current program (Home).
You cannot assign different
modes within a program.
Emergency Heat (Em
Heat) mode is only
available if you have
selected Heat Pump as
your Heat Type and
enabled the Emergency
Heat function in the
setup menu.
You can opt to turn
the System Off to
shut down all HVAC
operations including
fan operation.
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