Turbo Bucket's Take On RADDWC: Grow Room Build-Up

I've got a problem with all of this. This is all in spec of the driver, if the boards are designed correctly. Now heat of the driver does make a difference. No board should be going dim unless the driver is in an over heat mode.
 
TurboBucket said:
Great. It seem(s)ed to run 5 just fine. It can handle 6. According to the meanwell specs and the specs on his site
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Yeah a little over 6 as I calculate it (6.6 to be closer).
 
TurboBucket said:
Everything fired up fine with all 5 boards in series measured 149v total circuit. Installed into the room. Ran it soft for the first day, 30-40% dimmer, the next day cranked it up ran full current 2100ma checking board surface and driver temp hourly or more frequently, max board temp 115°f max driver temp 110°f measured with non contact infrared thermometer. The next day I dropped the lights to a more appropriate height and dropped the current to ≈75%. About 6 hours later went to double check everything 3 boards were lit two were not. Pulled wires off front board plugged into spare all 5 lit. Disconnected that light and it's been running on 4 at 50% current since. Driver is 2100ma
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I did :thumb:
 
TurboBucket said:
I did :thumb:
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Yes, you did say that. My memory is shot.

Hmmmm, this looks like a mismatch between a driver and the boards. Either the boards have more/less resistance, which does happen, or the driver is not liking the temps and turning down.

TurboBucket said:
It also ran all 5 boards with the spare after it went down. The case was a little over 100°f at that point.
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Yes, but if you connect 5, after a while, it will power down some, due to its temperature. I'm thinking.

I bet if you let the driver cool down, it will light them for a while, then turn down and two will go out.

Are they on one end (front end or back end)? Of the series chain?
 
TurboBucket said:
I'm thinking that board is shorted. Otherwise switching a board in and out wouldn't make a difference.
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It could be, but I would think if it was, it would ohm zero.
 
TurboBucket said:
Yea I just did, the last set of pics was from minutes ago. 4+questionable board=3 lighting90v. 4+spare= 5 lighting150v
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There is something wrong with that one board.

I'm sort of lost as to what the problem would be. The only place you can have a short on that board, by my guess. Is the resistor at the edge, and the power connector. The rest of the board is a series chain of sets of 10 LEDs. I downloaded the picture and zoomed in to see the copper layer.

Ok, not the only place, but the suspected places. The copper could have a hairline connection under the white solder mask.
 
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