Garmin Apollo CNX80 Installation Manual

Also see for Apollo CNX80: User Newsletter User Newsletter Supplemental Flight manual Pilot's guide Data list

TroubleshootingApollo CNX80 Installation Manual 560-0982-00 Rev D 4-3Table 4-1. Troubleshooting GuideProblem Possible Cause SolutionDST data (Distance,Speed, Time) is notdisplayed on theSL30.• The CNX80 is not configuredcorrectly.• The SL30 is not set up for DSTdisplay.• Go to serial port setup page and verifythat RS232 port to SL30 is set to SL30on RX and MAPCOM on TX.• Consult SL30 users guide for setup ofDST display.CNX80 is notreceiving headingfrom compass system(ARINC 429 headinginput used)• CNX80 ARINC 429 input notconfigured correctly.• ARINC 429 input port speed notcorrect• Wiring connections are incorrect.• Check ARINC 429 input port setting forport that device is connected to.• Check ARINC 429 input port speedsetting for port that device is connectedto and verify that the speed is correct forthat device.• Check wiring.CNX80 is notreceiving headingfrom compass system(synchro headinginput used)• Heading Valid input invalid.• 26VAC reference voltage isincorrect• Wiring connections are incorrect• Check that heading valid input (P5-57)is > 9 VDC. State of this input can bechecked in Ground Maintenance Mode.• Check that 26VAC, 400Hz reference issupplied to P5-20,39• Check wiring.CNX80 headingdiffers greatly fromcompass system(synchro hdg only)• Synchro X,Y,Z legs are crossed• 26VAC reference Hi and Lo areswapped.• 26VAC reference supplied toCNX80 is different than 26VACreference used by compass system.• Check wiring.• Check wiring.• Verify that CNX80 and compass systemare using the same 26VAC reference.CNX80 is notreceiving baro-correction settingfrom altimeter• CNX80 baro pot input notconfigured correctly.• CNX80 baro pot input notcalibrated• CNX80 is not the only device tiedto the altimeter baro pot• Check baro pot configuration in GroundMaintenance Mode• Calibrate baro pot• Ensure CNX80 is the only deviceconnected to the altimeter baro potAutopilot is notgetting GPSS/RollSteering data from theCNX80 (ARINC 429Roll Steering used)• CNX80 does not have a positionor flight plan entered.• CNX80 ARINC 429 output notconfigured correctly.• ARINC 429 output port speed notcorrect• Wiring connections are incorrect.• Acquire GPS position and enter a flightplan.• Check ARINC 429 output port settingfor port that autopilot is connected to.• Check ARINC 429 output port speedsetting for port that autopilot isconnected to and verify that the speed iscorrect for autopilot.• Check wiring.Autopilot is notgetting GPSS/RollSteering data from theCNX80 (RS232 RollSteering used)• CNX80 RS232 output notconfigured correctly.• Wiring connections are incorrect.• Ensure output port setting is MAPCOMfor port that autopilot is connected to.• Check wiring.