Garmin GRA 55 Maintenance Manual - Page 29

Fault Type Digital HW Digital HW Fault Name Description Cause Clock Generator I2C Clock Generator is read to determine correct frequency output. Main Temp Sensor I2C Temperature Sensor is read to RF Temp Sensor I2C determine correct operation. ADC did not respond to ADC (Voltage Monitor) sampling conversion command within 20us Internal communication error ADC Monitor (X) (Fault also included in POST, Power On Self Test Faults) [1] ADC used to monitor internal unit voltages fails ADC failure self-test Clock Generator Register Clock generator programming failure Clock generator failure DDR Memory integrity test Memory failure Flash-to-RAM Code Failed to validate code sections in memory Code corrupted in flash memory Code corrupted during transfer from flash to RAM Sensor Code CRC Sensor processor code failed validity check Code corrupted during transfer from flash to main processor Code corrupted during transfer from main to sensor processor Sensor Status Sensor CPU fails to Sensor processor respond to Main failure CPU or packet Internal information is not communication correct from sensor error Sensor Watchdog Sensor processor Sensor processor failure reset signal triggered by sensor Internal watchdog communication error Resolution Cycle power to unit. If fault persists, return unit to Garmin for service. Cycle power to unit. If fault persists, return unit to Garmin for service. 190-01277-A3 Rev. 1 System Maintenance Manual GRA 55/5500 Bell 206 STC Page 5-3