Ok I have a confusing situation regarding some Emergency lighting. I have a string of 2D 28w lights in a ward corridor at an nhs unit which are switched from a nursing station with a key switch next to them. It appears that the key switch only breaks the permanent feed to the Emergency fittings and not the whole circuit. I have three EM lights which are all out. Removing the covers I found that the charging indicators are not lit....I have 230 between the S/L and neutral but nothing between permanent live and neutral. In this situation with the battery connected nothing lights but as soon as you remove the battery the lamp lights... I get that and points to just battery issues. Now...when you operate the key switch the charging lamp comes on but the lamp does not light up at all...This Is what is confusing me. I replaced the tridonic ballast combo to check and still nothing. Am I correct in saying the issue is just the battery spent where it has been unplugged and left which when you plug back in causes an issue with the functioning of the ballast combo?? Really confused on this and just does not make sense or am I missing something simple here which I have overlooked in the confusion. Surely with the permanent feed reinstated and power on the switch line the lamp should light regardless of the battery state?? Any help would be much appreciated as it’s driving me nuts trying to figure this out. TIA
Last edited:
