YseanY Posted May 17, 2022 Share Posted May 17, 2022 I have 3 LED strips with ELV dimming power supplies (DiodeLED Omnidrive) that are working weird when turning off. I have these on a dimmer driver and when I turn off the LEDs, they would ramp down to turn off but then flicker back on and off immediately. I can't figure out what is happening. I've tried messing with the ramp speeds, min range, and dimming mode but none of them seem to fix it. When I put these on a non-dimmable driver, it does not happen. I have several other LED strips of the same brand with same dimming power supplies and they all work perfectly with the dimmable driver. These are all connected to a C4 Centralized Panel with dimmer module. Any ideas why this is happening? Suggestions for troubleshooting? Quote Link to comment Share on other sites More sharing options...
mstafford388 Posted May 17, 2022 Share Posted May 17, 2022 Check the dimming phase, could be different between the ones that are working fine and the ones that aren't. Quote Link to comment Share on other sites More sharing options...
YseanY Posted May 17, 2022 Author Share Posted May 17, 2022 Yea, I tried changing the phases between forward and reverse, doesn't effect anything. Quote Link to comment Share on other sites More sharing options...
mstafford388 Posted May 18, 2022 Share Posted May 18, 2022 Time to start eliminating things then. If I had to guess it's inconsistencies with the transformers. I would move one that you know works to one of the dimmer module channels that isn't working and see what happens. If it works fine it's not the dimmer module. I have seen this before where you have a handful of the same fixture and some work fine some don't, in my experience that's typically been with MLV not ELV though. Quote Link to comment Share on other sites More sharing options...
RAV Posted May 19, 2022 Share Posted May 19, 2022 Difference could also be if the transformers are different wattages, or different loading by distance or length of strip. Quote Link to comment Share on other sites More sharing options...
Cyknight Posted May 21, 2022 Share Posted May 21, 2022 Also, are there more than one transformer on the same dimmer connection on the ones that are acting up. Quote Link to comment Share on other sites More sharing options...
Gabi_Mac79 Posted May 21, 2022 Share Posted May 21, 2022 This is could quite likely be a minimum load issue, for the dimmer, have you tried using a dummy load connected across the ELV dimmer input terminals? As when the load is reduced the triac can't always time the switching correctly, so this would make sense with what you are describing. Quote Link to comment Share on other sites More sharing options...
Cyknight Posted May 22, 2022 Share Posted May 22, 2022 On 5/21/2022 at 3:46 PM, Gabi_Mac79 said: This is could quite likely be a minimum load issue, for the dimmer Fair point, ELV min wattage is 18W, at least something to check. OP note that is for actual draw, not what the ELV is rated for. Also, these are wired with a neutral right? Quote Link to comment Share on other sites More sharing options...
Cyknight Posted May 22, 2022 Share Posted May 22, 2022 On 5/17/2022 at 1:20 PM, YseanY said: When I put these on a non-dimmable driver, it does not happen This one's odd though.... Quote Link to comment Share on other sites More sharing options...
YseanY Posted June 1, 2022 Author Share Posted June 1, 2022 On 5/19/2022 at 6:38 AM, RAV said: Difference could also be if the transformers are different wattages, or different loading by distance or length of strip. They are different lengths and have different wattage power supplies. On 5/21/2022 at 2:39 PM, Cyknight said: Also, are there more than one transformer on the same dimmer connection on the ones that are acting up. These are all on individual dimmer connections. On 5/22/2022 at 4:01 PM, Cyknight said: Fair point, ELV min wattage is 18W, at least something to check. OP note that is for actual draw, not what the ELV is rated for. Also, these are wired with a neutral right? Yup, these are wired with neutral. Where can I adjust the min wattage? Is this the watt setting under advanced properties? Quote Link to comment Share on other sites More sharing options...
Cyknight Posted June 1, 2022 Share Posted June 1, 2022 2 minutes ago, YseanY said: Where can I adjust the min wattage? Is this the watt setting under advanced properties? No you can't adjust that - that is the minimum wattage required by the module to work properly at all. As in for an ELV transformer, it must be pulling a minimum of 18W (at 100%) when in use or you see a power leak. Quote Link to comment Share on other sites More sharing options...
YseanY Posted June 1, 2022 Author Share Posted June 1, 2022 32 minutes ago, Cyknight said: No you can't adjust that - that is the minimum wattage required by the module to work properly at all. As in for an ELV transformer, it must be pulling a minimum of 18W (at 100%) when in use or you see a power leak. Ah, got it. Looking at the spec sheets for the transfer, it looks like minimum load is 60% of the labeled wattage. If I remember correctly, these are 48w drivers, so it's pulling 28.8w. Quote Link to comment Share on other sites More sharing options...
Cyknight Posted June 1, 2022 Share Posted June 1, 2022 12 minutes ago, YseanY said: Ah, got it. Looking at the spec sheets for the transfer, it looks like minimum load is 60% of the labeled wattage. If I remember correctly, these are 48w drivers, so it's pulling 28.8w. Nope. You need to look at what the LEDs ON that powersupply are actually pulling - because THAT is what the powersupply will pull, and THAT is what needs to meet or exceed the 18w minimum. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.