Embraer EMB145 Operation Manual page 1531

CREW
AIRPLANE
AWARENESS
OPERATIONS
MANUAL
During normal operation, information contained on PFD 1, MFD 1 and
EICAS displays is provided by IC 600 # 1, while IC 600 # 2 provides
images for MFD 2 and PFD 2.
Both computers interact with each other and send outputs to the Aural
Warning unit to generate a tone indicating a caution or warning
message when there is an abnormal situation.
If IC 600 # 1 fails, RMU # 1 displays engine backup page 1
automatically and a red X is presented on displays PFD 1, MFD 1 and
EICAS. After the IC 600 # 1 failure, IC 600 # 2 can control the five
displays if the Symbol Generator ("SG") button on the left reversionary
panel is pressed. In this case, RMU # 1 goes back to the normal mode.
If IC 600 # 2 fails, a red X is displayed on PFD 2 and MFD 2. After the
IC 600 # 2 failure, IC 600 # 1 can control the five displays if the
Symbol Generator ("SG") button on the right reversionary panel is
pressed. RMU # 1 remains operating normally.
If both ICs fail, besides all displays presenting a red X, RMU # 1
automatically displays engine backup page 1.
Usually, airplane configuration options are set on IC-600 through
straps. If the number of installed options exceeds the maximum
adjustable through the IC-600 wiring, a configuration module (IM-600)
is installed. IM-600 can be installed only on airplanes equipped with
EICAS 16 or later. It stores information for several airplane
configurations.
On EICAS 16, an advisory CONFIG MISMATCH message appears if
there is a discrepancy between the configuration information of both
IM-600s in relation to both IC-600s.
On EICAS 16.5 or later, an amber CHK IC CONFIG message appears
in case of discrepancy between the following data: EMB-135 or
EMB 145 models, engine type, Long Range configuration, or
English/Metric units. The CONFIG MISMATCH message is also active
in case of discrepancy of the other parameters that do not trigger off
the CHK IC CONFIG message .
On EICAS 19, the message DAU AC ID MISCMP was incorporated to
inform a mismatch between the DAU 1 and DAU 2 configuration inputs
regarding airplane type.
If a IM-600 failure occurs, the IC-600 will use the last data read from
that source (when it was still working), and an advisory IC CONFIG
FAIL message will appear.
Page Code
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2-04-05 REVISION 30