Self-Test (3MIET & 3MID) Information
The LED indicator on emergency luminaires MUST be easily visible when the luminaire is in normal use. Luxonic always supplies green-for-good LEDs on its emergency luminaires. It is technically still acceptable to supply product with red-for-good LEDs, but this is a very outdated practice and has the strong potential for causing confusion on site.
A solid green LED indicates the battery is charging within parameters – it does not indicate a healthy lamp, nor that the battery will last the full 3 hour duration (1 hour mandatory, subsequent period to ensure emergency lighting is available after the emergency is over).
Emergency lighting needs to be tested regularly. To relieve maintenance staff of this duty, it is possible to install emergency inverters that test themselves at appropriate intervals. If such an inverter detects a failure it will report it via the LED (possibly via a DALI network too). The colour codes to interpret these failures are different for most suppliers of inverters (be aware not to mix them within one site) and are detailed below:
The LED colours can be reversed if the wires from the LED to the inverter are reversed – i.e it is possible for a slow flashing green LED on a Tridonic module to indicate a battery fault, this is often due to the battery not having been connected by the installer.
The self-test emergency control gear tests itself according to the following schedule (taken from their datasheet):
A full commissioning test is carried out automatically after permanent connection of the supply. The easy commissioning feature will set the initial test day and time to ensure random testing of units.
Functional tests are carried out for 30 seconds on a weekly basis under the control of the Micro controller. Initiation and timing of these tests is set during the commissioning of the luminaire.
A full duration test (3 hr. resp. 1 hr.) is carried out yearly to check the capacity of the batteries.’
The Tridonic system will perform self-testing at the time of day the system was first energised. This time can be forced at a later date by switching the power to the lights 5 times within 3 seconds at the time of day that is most appropriate for the tests to take place. The emergency units will test themselves randomly (not all at once) within a 7 day cycle – each fitting will test on the same day of the week.