A commercial fire alarm needs a user test every week, operating one manual call point and using a different one each time, and a service by a competent engineer at least every six months, as BS 5839-1 recommends. Both go in the fire log book. The weekly test takes minutes. The service is the one that gets missed.
By Sebastian Grabowski, DC Fire & Security, Luton. Updated November 2026.
| Interval | What | Who |
|---|---|---|
| Weekly | Operate one manual call point, rotating through them week by week. Confirm the panel receives it, the sounders fire and any monitoring signal gets through. Log it. | A member of staff. No qualification needed, just the log entry |
| Every 6 months at most | Full service to BS 5839-1: panel, batteries, a proportion of devices tested on rotation so everything is covered across visits, cause-and-effect checks, certificate issued | A competent fire alarm engineer |
| Across the year's visits | Every device verified, and standby battery capacity confirmed | A competent fire alarm engineer |
| After any activation or fault | Investigate, record, rectify | Responsible person, with an engineer as needed |
This page covers commercial systems designed to BS 5839-1. For the standard itself, see our guide to what BS 5839 is.
The point of the weekly test is not the bell. It is proving the chain works: call point to panel, panel to sounders and, if the system is monitored, the signal to the receiving centre. Use a different call point each week so every one gets exercised over time. The test key means no broken glass.
Warn occupants first, keep it to the same day and time each week so nobody treats a real alarm as the test, and if the system is monitored, either warn the receiving centre or use the agreed test procedure so nobody is dispatched. Then write it down: call point number, date and initials, in the fire log book. An unlogged test never happened, as far as an enforcement officer or an insurer is concerned. Our step-by-step guide to how to do a weekly fire alarm test walks through it.
Most failures in testing are habits, not faults. These are the ones we see most.
A proper BS 5839-1 service is not a quick spray of test smoke. It checks the panel and its event log, so unexplained events are investigated and not just cleared. It tests the standby batteries under load, and functionally tests a rotating proportion of detectors and call points so the whole system is proven across the year. It verifies sounder levels, checks any cause-and-effect such as door releases, plant shutdowns and smoke vents, and ends with a certificate for the log book.
Two visits a year is not a sales invention. BS 5839-1 recommends the service interval does not exceed six months, so one annual visit leaves you outside the code's recommendation for half of every year. We service commercial fire alarm systems, and the price depends on the number of panels and devices and the type of building. Our fire alarm servicing and maintenance page explains how a service visit runs.
The Fire Safety Order does not name a qualification. In practice a competent person is someone with the training, tools and test equipment to service to BS 5839-1 and the paperwork to prove it: engineer training records, calibrated equipment and proper certificates. Third-party certification schemes exist for fire alarm firms, with BAFE SP203-1 the best known, and some insurers ask for them by name. Check your policy wording, and ask any provider what they hold before they touch the panel.
What competent does not mean is the caretaker with the panel code, or an electrician who fits consumer units and will have a look. Fire alarm servicing is its own discipline, with device rotation schedules, battery load checks and cause-and-effect testing.
The Fire Safety Order requires the responsible person to keep fire safety equipment in efficient working order and good repair. GOV.UK tells businesses to carry out regular checks that all fire alarm systems are working and to record any faults. Neither fixes an interval. BS 5839-1 does, and it is the standard fire officers, insurers and courts use to judge whether you did enough. That is why weekly and six-monthly are the figures to follow.
If a call point does not sound the alarm, or a sounder stays silent, record it and ring your engineer the same day. Treat any part of the building that is not covered as unprotected until it is fixed, and tell the people who work there. Put the repair, the date and the engineer's name in the log book.
There is a self-interested reason to service on time that has nothing to do with compliance. Dust-loaded detectors and tired batteries are common causes of nuisance activations, and nuisance activations teach occupants to ignore the alarm, which is the most dangerous habit a building can have. If your system has started going off for nothing, our guide to a fire alarm that keeps going off walks through the causes, and a service visit often finds them. For the cost of a new system, see commercial fire alarm system costs.
If you have a service plan with us, we send you a reminder before your next visit is due, and it is still worth keeping the date in your own fire log.
Email photos, your report or the system details to info@dcsecurity.co.uk, or use the form. We usually come back with a price the same day. Luton, Bedfordshire, Hertfordshire, Buckinghamshire and London.
Send photos for a price · No obligation · Response within 24 hours