Maintained/non-maintained emergency fitting behaving wrong
An emergency fitting is in the wrong mode — a maintained fitting that should stay lit is off in normal use, or a non-maintained one is on all the time — usually a wiring/configuration issue.
Safety first
Isolate before working. Maintained vs non-maintained wiring/config affects how the fitting behaves in an emergency — get it right. Licensed work.
Isolate, lock out / tag out, and prove dead before working unless a live test is specifically required, authorised, and carried out under proper supervision. Always follow local regulations, your site procedures, and the equipment manufacturer's documentation.
Apprentice mode
Full walk-through — the why, what readings mean, mistakes & safety.
Likely causes
Ranked from most to least likely.
- 1
Maintained/non-maintained wiring incorrect
Most likelyMaintained fittings need a switched (lit-in-use) feed plus permanent supply; non-maintained only light on failure. Miswiring swaps the behaviour.
- 2
Configuration / link set wrong
#2Some fittings have a maintained/non-maintained selection set incorrectly.
- 3
Switched feed missing (maintained appears off)
Least likelyA maintained fitting with no switched feed looks off in normal use.
Reports are saved on this device to reflect what you actually find.
Testing sequence
Work through one test at a time. Expected reading and what each result means.
On the tools? Job Mode shows one test at a time with thumb-sized buttons — your place and readings carry straight over.
Enter Job ModeConfirm the intended mode (maintained vs non-maintained) for this location.
A clear required behaviour.
Requirement clear — check wiring/config against it.
Confirm the design intent before changing anything.
View all expected readings at once
Fault-finding flowchart
The same logic as a decision tree.
- 1start
Emergency fitting wrong mode
→ step 2 - 2decision
Is the intended mode (maintained / non-maintained) clear?
Yes→ step 3No→ step 4 - 3decision
Do the wiring and mode config match the requirement?
Yes→ step 5No→ step 6 - 4result
Confirm the design intent first.
- 5result
Re-verify permanent + switched supplies.
- 6result
Correct the wiring/config to the required mode; re-test.
Common mistakes apprentices make
- Confusing maintained and non-maintained behaviour.
- Missing the switched feed a maintained fitting needs.
- Changing the mode without confirming the design intent.
- Not re-testing emergency operation after rewiring.
When to stop & escalate
Maintained/non-maintained configuration must match the building's emergency lighting design — confirm and rectify with a licensed person, then test and record.
If you're past your competence, authorisation, or the safe limits of the job — stop and hand it on. There's no fault worth getting hurt over.
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Related faults
Emergency light stays on / won't go back to normal
An emergency fitting stays in emergency (battery) mode or its charge/fault LED stays wrong even with normal supply present — pointing at the supply sensing, charging, or the fitting.
Exit sign not illuminated
An illuminated exit sign is dark — it may have lost supply, failed its lamp/LED, or have a faulty driver. A life-safety fitting that must be kept working.
Smart switch not working (no neutral at the switch)
A smart/Wi-Fi switch won't power up, drops offline, or makes the light glow/flicker — commonly because there's no neutral at the switch, which many smart switches need.