Troubleshooting guide

ARTEX AIRCRAFT SUPPLIES, INC. 570-1600
4 Flashes - Low power detected. Occurs if output power is below approximately 33 dBm (2
watts) for the 406 signal or 17 dBm (50 mW) for the 121.5 MHz output.
 Check coax and connections
 Check antenna installation
 Check that the frequencies are within acceptable limits
5 Flashes – Indicates the ELT was not programmed, or is incorrectly programmed. Does not
indicate erroneous or corrupted programmed data.
6 Flashes – Indicates the G-switch loop between pins 5 and 12 at the D-sub connector is not
installed. ELT will not activate during a crash.
 Check that the harness D-sub jumper is installed by verifying less than 1 ohm
of resistance between pins 5 and 12.
7 Flashes – Indicates that the ELT battery has too much accumulated operation time (> 1hr,
see below). Battery may still power ELT; however, it must be replaced to meet
FAA specifications. May also indicate damage to the battery circuit.
2.8.2 Self-Test Schedule
Artex recommends that the ELT be tested every 1-2 months. Follow the steps outlined above.
NOTE: The self-test time is accumulated in a register on the battery pack. The register
records activation time in 30 second increments so all activations will count as at
least 30 seconds, even if the actual time is much less. Total allowable time is 60
minutes as determined by FAR 91.207 and RTCA DO-204. After this time has
been accumulated a 7-flash error will be presented after the self-test. The
battery must be replaced at this point for the ELT to remain in compliance.
Always follow ELT testing requirements per local or national authorities.
2.9 Sealing Connectors in Wet Environments
This step is optional. Once all tests have satisfactorily been completed and all harness
connections have been verified to be correct, the connectors at the remote cockpit switch and
the ELT may be sealed to help prevent moisture from wicking into the connector pins.
Seal using an electronics grade (‘neutral cure’), non-slumping RTV such as GE Silicones RTV162,
Dow Corning 748RTV or Silastic 1080RTV. (Sourcing hint: Check pet stores that sell aquariums).
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