Garmin GNS 480, Инструкция по установке, Страница: 129 / 200

Troubleshooting
GNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 4-3
Table 4-1. Troubleshooting Guide
Problem Possible Cause Solution
•
GNS 480 ARINC 429 input not
configured correctly.
•
Check ARINC 429 input port setting for
port that device is connected to.
•
ARINC 429 input port speed not
correct
•
Check ARINC 429 input port speed
setting for port that device is connected
to and verify that the speed is correct for
that device.
GNS 480 is not
receiving heading from
compass system
(ARINC 429 heading
input used)
•
Wiring connections are incorrect.
•
Check wiring.
•
Heading Valid input invalid.
•
Check that heading valid input (P5-57) is
> 9 VDC. State of this input can be
checked in Ground Maintenance Mode.
•
26VAC reference voltage is
incorrect
•
Check that 26VAC, 400Hz reference is
supplied to P5-20,39
GNS 480 is not
receiving heading from
compass system
(synchro heading input
used)
•
Wiring connections are incorrect
•
Check wiring.
•
Synchro X,Y,Z legs are crossed
•
Check wiring.
•
26VAC reference Hi and Lo are
swapped.
•
Check wiring.
GNS 480 heading
differs greatly from
compass system
(synchro hdg only)
•
26VAC reference supplied to GNS
480 is different than 26VAC
reference used by compass system.
•
Verify that GNS 480 and compass
system are using the same 26VAC
reference.
•
GNS 480 baro pot input not
configured correctly.
•
Check baro pot configuration in Ground
Maintenance Mode
•
GNS 480 baro pot input not
calibrated
•
Calibrate baro pot
GNS 480 is not
receiving baro-
correction setting from
altimeter
•
GNS 480 is not the only device tied
to the altimeter baro pot
•
Ensure GNS 480 is the only device
connected to the altimeter baro pot
•
GNS 480 does not have a position
or flight plan entered.
•
Acquire GPS position and enter a flight
plan.
•
GNS 480 ARINC 429 output not
configured correctly.
•
Check ARINC 429 output port setting
for port that autopilot is connected to.
•
ARINC 429 output port speed not
correct
•
Check ARINC 429 output port speed
setting for port that autopilot is
connected to and verify that the speed is
correct for autopilot.
Autopilot is not getting
GPSS/Roll Steering
data from the GNS 480
(ARINC 429 Roll
Steering used)
•
Wiring connections are incorrect.
•
Check wiring.
•
GNS 480 RS-232 output not
configured correctly.
•
Ensure output port setting is MAPCOM
for port that autopilot is connected to.
Autopilot is not getting
GPSS/Roll Steering
data from the GNS 480
(RS-232 Roll Steering
used)
•
Wiring connections are incorrect.
•
Check wiring.
RMI pointer does not
indicate correctly
•
Desired RMI source has not been
selected
•
Select desired RMI source from NAV or
GPS.