System Maintenance Manual

Page 5-54 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision G 190-00682-01
Failure Message Cause Solution
MFD1 SERVICE – needs service.
Return unit for repair.
The G1000 has determined MFD1
needs service.
• Ensure the MFD connector is
fully seated and locked.
• If the unit was started in a very
dark environment the photocells
may not have enough light to
initially raise the CCFT level.
Go to the GDU STATUS page
in configuration mode, ensure
CCFT CRNT 1 & 2 levels are
above 50.
 If the CCFT levels are not
above 50, apply light to the
photocell and observe if the
CCFT level rises.
 If the CCFT level rises,
disregard the message.
 If the CCFT level does not
rise, replace the MFD
• Replace the MFD
PFD 1 SERVICE – needs service.
Return unit for repair.
The G1000 has determined
the specified PFD needs
service.
• Ensure the PFD connector is
fully seated and locked.
• If the unit was started in a very
dark environment the photocells
may not have enough light to
initially raise the CCFT level.
Go to the GDU STATUS page
in configuration mode, ensure
CCFT CRNT 1 & 2 levels are
above 50.
 If the CCFT levels are not
above 50, apply light to the
photocell and observe if the
CCFT level rises.
 If the CCFT level rises,
disregard the message.
 If the CCFT level does not
rise, replace the PFD
• Replace the PFD.
PFD 2 SERVICE – needs service.
Return unit for repair.
PFD 1 VOLTAGE – PFD 1 has
low voltage. Reducing power
usage.
The specified PFD supply
voltage is low.
• Check input voltage to PFD.
• If input voltage is ok, replace
PFD. .
PFD 2 VOLTAGE – PFD 2 has
low voltage. Reducing power
usage.
MFD1 VOLTAGE – MDF1 has
low voltage. Reducing power
usage.
The MFD supply voltage is
low.
• Check input voltage to MFD.
• If input voltage is ok, replace
MFD.