4 Flash Error after performing self-test
406 MHz or 121.5 MHz output power too low. Also may indicate 406 MHz frequency not correct.
1) Check coax cable and connections.
2) Check antenna installation.
3) Check that the frequencies are within acceptable limits.
4) Change cable length by about 5”.
5 Flash Error after performing self-test
Indicates that the ELT has not been programmed, or has been programmed improperly.
Verify 406 MHz programming. Reprogram to short message.
6 Flash Error after performing self-test
G-switch loop between pins 5 and 12 at the D-sub connector not installed – ELT will not activate during a crash.
1) Check that the harness D-sub jumper is installed by verifying less than 1 ohm of resistance between pins 5 and 12.
5) Install jumper wire if missing.
Table 2 – Troubleshooting Guide
SYMPTOM
LIKELY CAUSE
ACTION
7 Flash Error after performing self-test
ELT battery counter has accumulated >1 hr operating time. Battery may still power ELT, but must be replaced to meet FAA requirements. May also indicate damage to the battery circuit.
Replace battery.
Remote Switch LED always on (steady)
Wiring error or frayed wires shorting out pins on back of Remote Switch
1) Verify wiring.
6) Verify integrity of all crimp or solder connections on harness.
ELT will not turn ‘OFF’
Battery too low to support 406 burst – causes circuit to reset.
Remove battery pack to disable. Replace battery pack.
Table 3 – Troubleshooting Guide (continued)
5.1 Special Precautions for ESD
Artex ELTs are tested to make sure that the complete ELT is safe from damage from most Electrostatic Discharge (ESD) events. However, when the battery pack is being replaced, some components are more vulnerable to damage from ESD.
ESD is defined as any discharge of static electricity. The spark generated from walking across a carpet and touching a door knob is an example of an ESD event. The level of ESD discharge that can damage a circuit is much smaller and not normally felt. To protect the circuits of the ELT when you are replacing the battery please do the following:
1) Only disassemble the ELT on a workbench that has been electrically grounded. This may be a metal bench with a ground wire tied to earth ground or a workbench with a special ‘ESD’ mat connected to earth ground.
2) Touch the ground surface momentarily to ‘discharge’ yourself before touching the ELT or battery. During the battery replacement process, frequently contact with the grounded surface to minimize static buildup. Electronics workers wear special body contact straps with a grounding cable. If available, one should be used. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL ME406P ELT(33)
