Fire alarm panel fault in London
Fire alarm panel fault in London? A yellow light and a beeping panel mean the system has found a problem with itself. Here is what each light means, what to check, and how we find the cause.
Free survey and a written quote, with a reply within 7 to 24 hours.
Fire alarms
Book a free survey
Step 1 of 4Tell us what the panel is doing. We call you back to arrange the visit.
Request received
We've got it from here.
Step 1 of 5 is done. Here is how the rest goes.
- Request sentDone
- 2We call youNext
- 3Free survey
- 4Written quote
- 5Work done
Next: we call you back
An engineer rings you within 7 to 24 hours, during opening hours, to talk the building through and book your free survey. Then the price in writing, and no obligation either way.
- Service
- We'll call
Direct answer: a fault light means the panel has found a problem with the fire alarm system itself, not a fire. Until the cause is found the alarm may not work everywhere it should. Note what the display shows, check the simple things below, and have an engineer trace it. Silencing the buzzer stops the noise, not the fault.
What the fault lights on the panel mean
Every panel is laid out a little differently, but most show the same family of fault lights. The general fault light comes on with any of them; the specific light tells you where to look.
| Light | What it usually means | What you can check |
|---|---|---|
| Supply or power fault | The panel has lost its mains supply and is running on its standby batteries. | Whether the fused spur that feeds the alarm has been switched off or its fuse has blown, often during electrical work. It is usually labelled Fire alarm, do not switch off. |
| Battery or charger fault | The standby batteries are failing, disconnected or not charging. Detection still works on mains power, but would stop in a power cut. | When the batteries were last changed, from the fire alarm log book. The batteries themselves are inside the panel and are an engineer's job. |
| Earth fault | Somewhere in the wiring, a conductor is touching earth. | Recent drilling, building work or a water leak near the alarm cables. |
| Zone or loop fault | An open or short circuit on a detection circuit, or a detector missing from its base. | Whether decorators or builders have taken detector heads off or covered them. |
| Sounder fault | A problem on the circuit that feeds the sounders and beacons. | Whether a sounder or beacon has been knocked, damaged or removed. |
| System fault | The panel's own processor or memory has reported an error. | Nothing on site. This one needs an engineer. |
| Disablement | Not a fault: part of the system, such as a zone or the sounders, has been switched off on purpose. | Who disabled it and why. A disabled zone is a part of the building with no detection. |
The labels differ between makes. On a C-TEC or Fike panel the display and the zone lights narrow it down further, which is why a photo of the front of the panel helps us before anyone visits.
What to do when the panel shows a fault
Read the panel
Which lights are on, the zone number, any message on the display. Take a photo of the front of the panel.
Silence, do not reset
Silence the buzzer if you need to, but do not reset, isolate or disable anything you are not sure about.
Check the simple causes
The fused spur, recent works, missing or covered detector heads, a leak near the cables. The table above says where to look.
Record it and call
Write the date, time and what the panel showed in the fire alarm log book, tell the Responsible Person, and call an engineer with the details.
Silencing the buzzer is not fixing the fault
Most panels let you silence the internal buzzer, and it is tempting to do that and move on. The fault stays, and so does the gap in protection: a battery fault means the alarm would stop in a power cut, and a zone fault can leave a floor without detection.
Standby batteries are one of the commonest causes. They sit inside the panel, wear out over a few years, and only show their age when the panel asks them to carry the load. On a service visit we open the panel to check them.
How we find the cause
On a fault call the engineer reads the panel's event log first, because it shows whether the fault is new, intermittent or weeks old. Then the supply, the batteries, the circuits and the devices are checked in order until the cause is found. We service C-TEC and Fike panels and work on systems other companies installed.
When it is fixed you get a written note of what was wrong and what was done, for your log book. If the panel is beyond economic repair we say so and explain what replacing it would involve. The full process is on our fire alarm repair page.
What a fault call costs
A fault cannot be priced until it has been found. Tell us what the panel is showing and we give you an honest range on the phone, and the price is confirmed in writing before any work starts.
Fire alarm panel faults: your questions
Can I reset the panel myself?
You can usually silence the panel buzzer, and on most panels a reset needs a key or an access code held by whoever is responsible for the building. A reset clears the display, not the cause: if the fault is real it comes back, sometimes hours later. Write down what the display said before you reset it, because that is exactly what the engineer needs to know.
Is the building still protected while the panel shows a fault?
Partly, and it depends on the fault. With a battery fault the detection keeps working while the mains is on, but would stop in a power cut. A zone or loop fault can leave part of the building with no detection at all. A disablement light means something has been switched off on purpose. Until it is fixed the Responsible Person should know, and the fire risk assessment may call for extra checks in the affected area.
What should I tell you when I call?
The make of the panel, which lights are on, any wording or zone number on the display, and whether anything changed recently: building work, decorating, a leak or a power cut. A photo of the front of the panel does the same job, and you can send it to us on WhatsApp.
How quickly will you call back?
We call every enquiry back within 7 to 24 hours, during opening hours, Monday to Friday 9am to 7pm and Saturday 10am to 3pm. We do not run a 24-hour line, and we would rather say so than promise one. If the alarm itself is sounding, treat it as a fire and follow your building’s fire procedure: a fault light on its own is not an evacuation signal.
Free survey · No obligation
Panel showing a fault?
Send us what the display says and we will tell you what it means. We call every enquiry back within 7 to 24 hours.
- BAFE SP203-1 registered for fire alarms, Fike and C-TEC certified
- Written quote before any work starts
- Called back within 7 to 24 hours