If a problem is detected in the ELT, the LED will produce a coded signal. The LED will flash in order of importance with approximately .5 to 1 second pulse between each coded signal if multiple errors are present. The coded signal and related problems are as follows:

• 1 flash indicates a G-switch loop open failure
• 3 flashes indicate a 406 MHz transmitter problem such as defective or unconnected coax, low power output or programming error
• 5 flashes indicate no navigation data present for ELTs interfaced to a GPS nav interface unit. This error is most likely due to faulty interface wiring, improper programming, invalid navigation data caused by nav system not powered up or GPS nav interface unit (P/N 453-6500) not being present
• 7 flashes indicate a battery problem. Usually this occurs when the battery usage time is over an hour. A bench test by an approved Artex service center can indicate how many times the ELT has been activated and for how long

Southeast Aerospace has full bench test and programming capabilities for all Artex (Cobham) ELTs. Please contact the SEA Service Dept for any ELT service questions.