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Melissa SmithAug 18, 2025
What to do if Apollo Security Sensors show Error Code E-09?
- Aallen62Aug 18, 2025
To resolve error code E-09 on your Apollo Security Sensors, ensure the reflector is uncovered when ‘SET’ is selected, and verify a clear line of sight from the detector to the reflector within a 0.5m radius. Also, confirm that the correct distance has been selected and the appropriate reflectors are in use. If problems persist, realign the detector.







