AdvancedMedium risk

Automatic emergency-light test system reporting faults

An addressable / automatic emergency-lighting test system is flagging faults or losing communication with fittings — common in larger commercial buildings.

Start fault-finding

Safety first

These systems monitor life-safety fittings — a comms fault can hide a real fitting fault. Isolate before working on fittings; licensed work, follow the system documentation.

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.

Full detail — causes, the why, and common mistakes.

Likely causes

Ranked from most to least likely.

1
A genuine fitting fault reported
Most likely
The system has correctly detected a failed fitting/battery/lamp — find and rectify it.
2
Addressing / comms loss to a fitting or loop
#2
A wiring or addressing fault loses communication with one or more fittings.
3
Controller / panel fault
#3
The central test controller or its configuration is at fault.
4
Central battery system fault (if applicable)
Least likely
On central-battery systems, the central supply/battery has a fault.

Reports are saved on this device to reflect what you actually find.

Premium fault tree

The full ranked causes, test sequence and flowchart for this fault are part of Sparkie Sidekick Pro.

Coming soon — no payment required during preview.

Testing sequence

Work through one test at a time. Expected reading and what each result means.

Test 1 of 2

Read the exact fault(s) and which fitting(s)/loop the system reports.

Expected reading

A specific fault and location.

Your actual reading

If it passes

A specific fitting fault — go and rectify that fitting.

If it fails

If comms/loop faults, check the wiring/addressing.

Often leads toEmergency light fails its discharge test Exit sign not illuminated

View all expected readings at once

1. Read the exact fault(s) and which fitting(s)/loop the system reports.

A specific fault and location.

2. For comms faults, check the loop wiring/addressing to the affected fittings.

Sound loop wiring and correct addressing.

Full test sequence

The step-by-step test flow with expected readings for this fault is part of Sparkie Sidekick Pro.

Coming soon — no payment required during preview.

Fault-finding flowchart

The same logic as a decision tree.

1
start
Emergency test system fault
→ step 2
2
decision
Does it report a specific fitting fault?
Yes→ step 3No→ step 4
3
result
Rectify that specific fitting and re-test.
4
decision
Is the loop wiring/addressing sound?
Yes→ step 5No→ step 6
5
result
Suspect the controller/central system — per documentation.
6
result
Loop/addressing fault — rectify.

Common mistakes apprentices make

Dismissing a system fault as 'just the panel' when a fitting really has failed.
Not reading the specific reported fitting/loop.
Overlooking addressing after a fitting swap.
Working on fittings without isolating.

When to stop & escalate

Addressable/central-battery systems often need the manufacturer's documentation and a competent commissioning approach. Reported fitting faults must still be physically rectified and recorded.

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.

Related faults

Emergency & exit lighting

Emergency light fails its discharge test

An emergency fitting works on mains but won't stay lit for the required duration when tested (mains removed) — usually a failed/aged battery, but can be charging or lamp issues.

4 causes3 test steps

QualifiedHigh risk

Emergency & exit lighting

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.

4 causes3 test steps

QualifiedHigh risk

Data & comms

Data cabling run fails certification / wiremap fault

A structured cabling run fails a tester (wiremap fault, open, short, split pair, or excessive length) — so it won't reliably carry the network even if a link sometimes appears.

4 causes3 test steps

QualifiedLow risk