A sensor feeds information to a control system, and what the system then does depends on its settings and its wiring -- not on what you assume it should do.
Controlled lighting produces fault reports that are not faults. Somebody changed a setting, or the sequence was always like that, and a lamp gets replaced for nothing.
The documented sequence is what turns a guess into a diagnosis. It states what the system is supposed to do, under what inputs, at what times. Without it you are comparing the behaviour against your expectation, and your expectation is not evidence.
Check yourself: A light stays on when it should have switched off. Failed lamp or failed control?
Answer: Neither, necessarily. A light staying on may reflect a timer setting rather than a failed lamp.
A control system doing exactly what it was set to do produces the same symptom as a fault. Only the documented sequence tells you which of the two you are looking at.
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Written from the owner's poster for this lesson. Nothing added beyond what the poster states.
Written for Texas apprentices as free study material. The Texas apprentice licence is an application, not an exam (Occupations Code 1305.161), and nothing here counts as apprenticeship hours or continuing-education credit. VoltMark is not affiliated with, endorsed by, or sponsored by NFPA, PSI, TDLR, or any state or local licensing authority. Always follow your employer's safety programme and your supervising electrician.
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