Garmin GRA 55 Maintenance Manual - Page 30

System Maintenance Manual GRA 55/5500 Bell 206 STC, Rev. 1,

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Fault Type Electrical Fault Name (+ / -) 12.5V Monitor (Fault also included in POST, Power On Self Test Faults) [1] +12.5V RF Monitor (Fault also included in POST, Power On Self Test Faults) [1] +8V RF Monitor (Fault also included in POST, Power On Self Test Faults) [1] +80V Backup Monitor (Fault also included in POST, Power On Self Test Faults) [1] -6V RF Monitor (Fault also included in POST, Power On Self Test Faults) [1] Description Cause Resolution (+ / -) 12.5 V power Aircraft power input voltage out of range Check aircraft power supply. Cycle power to unit. rail outputs If fault persists, improper voltage Internal power supply failure download the assert log and send to Garmin for diagnosis. +12.5 V RF power rail outputs improper voltage Aircraft power input voltage out of range Check aircraft power supply. Cycle power to unit. Internal power supply failure If fault persists, download the assert log and send to Garmin for diagnosis. +8 V RF power rail outputs improper voltage Aircraft power input voltage out of range Check aircraft power supply. Cycle power to unit. Internal power supply failure If fault persists, download the assert log and send to Garmin for diagnosis. +80 V backup power rail outputs improper voltage Aircraft power input voltage out of range Check aircraft power supply. Cycle power to unit. -6 V RF power rail outputs improper voltage Aircraft power input voltage out of range Check aircraft power supply. Cycle power to unit. Internal power supply failure If fault persists, download the assert log and send to Garmin for diagnosis. 190-01277-A3 Rev. 1 System Maintenance Manual GRA 55/5500 Bell 206 STC Page 5-4

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190-01277-A3
System Maintenance Manual GRA 55/5500 Bell 206 STC
Rev. 1
Page 5-4
Electrical
(+ / -) 12.5V Monitor
(Fault also included in
POST, Power On Self
Test Faults) [1]
(+ / -) 12.5 V power
rail outputs
improper voltage
Aircraft power
input voltage out of
range
Check aircraft
power supply.
Cycle power to
unit.
Internal power
supply failure
If fault persists,
download the
assert log and
send to Garmin for
diagnosis.
+12.5V RF Monitor
(Fault also included in
POST, Power On Self
Test Faults) [1]
+12.5 V RF power
rail outputs
improper voltage
Aircraft power
input voltage out of
range
Check aircraft
power supply.
Cycle power to
unit.
Internal power
supply failure
If fault persists,
download the
assert log and
send to Garmin for
diagnosis.
+8V RF Monitor
(Fault also included in
POST, Power On Self
Test Faults) [1]
+8 V RF power rail
outputs improper
voltage
Aircraft power
input voltage out of
range
Check aircraft
power supply.
Cycle power to
unit.
Internal power
supply failure
If fault persists,
download the
assert log and
send to Garmin for
diagnosis.
+80V Backup Monitor
(Fault also included in
POST, Power On Self
Test Faults) [1]
+80 V backup
power rail outputs
improper voltage
Aircraft power
input voltage out of
range
Check aircraft
power supply.
Cycle power to
unit.
-6V RF Monitor
(Fault also included in
POST, Power On Self
Test Faults) [1]
-6 V RF power rail
outputs improper
voltage
Aircraft power
input voltage out of
range
Check aircraft
power supply.
Cycle power to
unit.
Internal power
supply failure
If fault persists,
download the
assert log and
send to Garmin for
diagnosis.
Fault Type
Fault Name
Description
Cause
Resolution