I assume it is these...

https://ansell-lighting.com/en/articles/news/a-closer-look-at-self-test-emergency-lighting

"

When the emergency lighting luminaire is initially installed, the fitting will randomly select a test date of between 200 and 365 days and once the installer has set the date, the fitting will continue to test at the same time every year for its full 3-hour test duration. Once the product has been connected to mains power and on charge for 24 hours, the luminaire will illuminate for 5 seconds for test purposes and every 30 days the installation will be tested for 10 minutes, after which the luminaire will show either regular function, or a fault as shown the details of which are shown below.

The test results are carried out by observation rather than manually testing each individual fitting, where there is no need to isolate the mains supply for testing,...

"

Not perhaps the easiest t guess if that info was not duplicated on the packet.

Mike

the fitting will continue to test at the same time every year for its full 3-hour test duration.

I thought that 3h tests were usually timed to happen when the building was to be unoccupied for a while after - no point in having a 3h battery if it happens to be nearly empty just when an emergency starts. Are they just presuming that there are several fittings in an area and they're unlikely to all get tested at the same time?

   - Andy.

Are they just presuming that there are several fittings in an area and they're unlikely to all get tested at the same time?

That is my understanding. I presume the chances.of two fittings side by side doing their test at the same time, and then there being a fire at that moment, is no more serious than it fails the self test and then no-one see the red LED for a while. It seems a bit odd but is probably OK.

Mike.

Most enlightening - many thanks. There is absolutely no mention of anything like this on the box nor in the installation instructions. Nothing about LED designations nor what they mean. My initial mention of a potential color change to denote a change in status was complete guesswork on my part.

It looks to be a bit of a mishmash to me, so I will leave the setting to manual test as it is now. Good idea but over complicated with mixed messaging, and badly implemented via the complete lack of instructions on the features I reckon.

Is there some means by which someone carrying out a periodic inspection would be aware that the individual unit was connected in self-test mode? As I understand it, a steady green light indicates status is  good whether the link is fitted or not.