INSTALLATION MANUAL OPERATION MANUAL INSPECTION LOG
KANNAD 406 AF-COMPACT
PAGE: 401
FEB 01/2008
TROUBLESHOOTING
1. General
Procedure for fault isolation onboard uses the indicator light of the ELT’s front
panel. This indicator light is activated by a self-test capability within the ELT.
2. Faults on Self-test
A. Visual Indicator
When the self-test is carried out, the number of flashes gives an indication of
the faulty parameter detected during the self-test.
(1) 3+1 flashes
- Low battery voltage:
Replace battery: Refer to § (4) Battery pack replacement, page 604.
(2) 3+2 flashes
- Low RF power:
Check 406 MHz power: Refer to § (3) Measurement of output powers,
frequencies and verification of digital message, page 603.
If power too low, refer to CMM 25-63-03 for repair.
(3) 3+3 flashes
- Faulty VCO locking (faulty frequency):Refer to § (3) Measurement of
output powers, frequencies and verification of digital message, page
603.
If test fails, refer to CMM 25-63-03 for repair.
(4) 3+4 flashes
- No identification programmed
Check programming: Refer to § (3) Measurement of output powers,
frequencies and verification of digital message, page 603.
To re-program the ELT refer to PR600 Programming kit user manual
(included in WinProg CD-Rom, programming software).
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