Garmin GRA 55 Maintenance Manual - Page 33

Fault Type Temperature Fault Name Main Temp (Fault also included in POST, Power On Self Test Faults) [1] RF Temp (Fault also included in POST, Power On Self Test Faults) [1] Description Cause Installed unit location is too hot/ cold Main board temperature greater than 100° C or less than -60° C Internal failure Installed unit location is too hot/ cold RF board temperature greater than 100° C or less than -60° C Internal failure Resolution Return unit to qualified temperature range as specified in Environmental Qualification Form (EQF). If fault persists, return unit to Garmin for service. Return unit to qualified temperature range as specified in Environmental Qualification Form (EQF). If fault persists, return unit to Garmin for service. [1] Fault can be found in the Power on Self Test (POST) fault list and in normal operational mode fault list. Review Table 5-1 fault tree for identification. 190-01277-A3 Rev. 1 System Maintenance Manual GRA 55/5500 Bell 206 STC Page 5-7