Why this decision matters
Testing before the final layout, lighting or network changes may miss a problem introduced by the completed work.
Work through the actual task
- Describe changed placement, obstructions and building work.
- Ask for coverage/environment checks alongside device diagnosis.
- Photograph agreed cable positions before walls close and keep the images with the handover documents.
Worked example
A detector fault starts after rooms are repainted and rearranged. This is a hypothetical example, not a completed customer installation.
The useful evidence at the end of this example is: A fault cause that accounts for the changed room conditions.
Limits and follow-up
Do not open mains powered equipment or defeat tamper switches. Arrange a qualified service visit when a fault needs internal inspection.
If the relevant check cannot be completed, record what remains uncertain and who will resolve it before work or sign-off proceeds.
Sources and equipment references
Checked for the product, supplier or information details used here. Exact procedures depend on the installed model; these links are not a substitute for its instructions.