Garmin G1000 System Maintenance Manual page 206

Failure Message
COM1 RMT XFR – COM1 remote
transfer key is stuck.
COM2 RMT XFR – COM2 remote
transfer key is stuck.
COM1 TEMP – COM1 over temp.
Reducing transmitter power.
COM2 TEMP – COM2 over temp.
Reducing transmitter power.
Page 5-58
Revision 4
Cause
The COM1 external remote
transfer switch is stuck in the
enabled (or "pressed") state.
The COM2 external remote
transfer switch is stuck in the
enabled (or "pressed") state.
The specified COM transceiver
is reporting a high temperature
condition and is reducing
transmit power to prevent
damage.
G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air
Solutions
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)
If problem follows the unit,
replace GIA1.
If problem persists, continue to
troubleshoot remote transfer
switch & wiring.
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):
If problem follows the unit,
replace GIA2.
If problem persists, continue to
troubleshoot remote transfer
switch & wiring.
•
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.
190-00716-01