Garmin Cessna Caravan G1000, Line Maintenance Manual

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Page 4-26 LMM for the Kodiak 100
190-02102-00 Rev.4
MFD1 VOLTAGE MFD1 has low voltage. • Check input voltage to the
GDU.
• If the input voltage is
correct, replace the GDU.
PFD1 BACKLIGHT CAL PFD1 backlight calibration
lost. • Replace the GDU.
PFD1 CONFIG PFD1 configuration error. • Reload configuration to the
GDU.
• If the fault persists, check
the master configuration
module harness for faults
and replace if necessary.
PFD1 COOLING PFD1 has poor cooling.
Reducing power usage. • Check the avionics
environment for proper
cooling and make any
necessary corrections.
• If the fault persists, replace
the GDU.
PFD1 KEYSTK A key is stuck on the
PFD1 bezel. • Select the GDU Test page
and verify the key is stuck
(corresponding indicator
will be green).
• Exercise the suspected
stuck key and reset the
GDU Test page to see if the
indicator remains green
without pressing the key.
• If the fault persists, replace
the GDU.
PFD1 MANIFEST PFD1 software mismatch. • Load the correct software.
PFD1 SERVICE A fault has been detected
in PFD1. • Replace the GDU.
PFD1 VOLTAGE PFD1 has low voltage. • Check input voltage to the
GDU.
• If the input voltage is
correct, replace the GDU.
Table 4-2. GDU 1050 System Messages (Continued)
System Message Cause Recommended Actions
Uncontrolled if Printed