Instruction Manual

Page 5-58 G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Revision 4 190-00716-01
Failure Message Cause Solutions
COM1 RMT XFR – COM1 remote
transfer key is stuck.
The COM1 external remote
transfer switch is stuck in the
enabled (or “pressed”) state.
Press the COM1 external remote transfer
switch again to cycle its operation.
Check COM1 external remote transfer
switch and wiring.
Switch GIA1 and GIA2, to identify
whether the unit or connectors/wiring is
at fault (Both GIAs must be configured
when swapped, see Section 3.9)
9 If problem follows the unit,
replace GIA1.
9 If problem persists, continue to
troubleshoot remote transfer
switch & wiring.
COM2 RMT XFR – COM2 remote
transfer key is stuck.
The COM2 external remote
transfer switch is stuck in the
enabled (or “pressed”) state.
Press the COM2 external remote transfer
switch again to cycle its operation.
Check COM2 external remote transfer
switch and wiring.
Switch GIA1 and GIA2, to identify
whether the unit or connectors/wiring is
at fault (Both GIAs must be configured
when swapped, see Section 3.9):
9 If problem follows the unit,
replace GIA2.
9 If problem persists, continue to
troubleshoot remote transfer
switch & wiring.
COM1 TEMP – COM1 over temp.
Reducing transmitter power.
The specified COM transceiver
is reporting a high temperature
condition and is reducing
transmit power to prevent
damage.
• Check fan, wiring and air tubing for
proper operation (if applicable).
• Replace cooling fan if unable to
determine if operating correctly.
• Replace GIA.
• If problem persists contact Garmin
Aviation Product Support for
assistance.
COM2 TEMP – COM2 over temp.
Reducing transmitter power.