Interfaces; Buttons; Test Status Leds; Maintenance Display - UPS Aviation Technologies AT7000 Installation Manual

Troubleshooting

9.2 Interfaces

9.2.1

Buttons

The TEST button located under the front panel fault status LEDs is pushed to initiate the
'Self Test' and 'Leg Fault' status information.
The front panel buttons under the display are used for navigating display pages as fol-
lows:
← and →
These buttons are used to select the column. When pressing one of these
buttons, the top page of either the previous (←) or next (→) group will be
displayed.
↑ and ↓
These buttons are used to scroll through the pages within a column.
Pressing the ↑ button will move the previous page, the ↓ button will move
to the next page.
Note: The pages wrap around. The display is used only for displaying trans-
ponder information. No configuration or data can be input using the front
panel display and buttons.
9.2.2

Test Status LEDs

The AT7000 includes six test status LEDs on the front panel. These LEDs are used to
provide transponder test results and are generally used by aircraft mechanics. Failure
lights will stay illuminated for 3 seconds after powering up. Once in the self test mode
the fail light will stay illuminated for 10 seconds. When in this mode, pressing any but-
ton will illuminate the failure for 30 seconds.
LED Color
Green
XPDR PASS
Red
XPDR FAIL
Red
CTRL PNL
Red
TOP ANT
Red
BOT ANT
Red
ALT
9.2.3 Maintenance Display Pages
The diagram on the next page illustrates the operating modes and access matrix. The
software version page is displayed only once at power up and is only displayed until the
self-test starts.
Page 46

Table 8 - Status LEDs Summary

Transponder pass, turned on if B.I.T.E. passes and the transponder is able
to operate.
Transponder fail, turned on if B.I.T.E. fails and the transponder is not able
to receive interrogations or generate replies.
Control panel fail, turned on if the transponder is not receiving valid con-
trol information on the selected control panel ARINC 429 input port.
Top antenna fail, turned on if the top antenna B.I.T.E. test fails.
Bottom antenna fail, turned on if the bottom antenna B.I.T.E. test fails.
Altitude fail, turned on if a valid altitude is not available from the selected
altitude input or if the altitude compare fails (when enabled).
© 2001 by UPS Aviation Technologies Inc.
Installation Manual
Description
560-0405-00 Rev –
December 14, 2001