Got a funny. Dimmers are V-Pro. The sort where you can change from leading to trailing edge and set a minimum and maximum level. Out of the box, the one driving the single central pendant, which is an Osram 10w 100mm LED globe type, at switch on at full is fine. But after a few minutes chops down to a lower level, then chops back up. And continues to do this. Like over current protection was cutting in.
A lamp blew and then...
Feb 25, 2021
Last reply: 5 years ago
10 Replies
Does it do the same if run, at say, half-brightness?
If not already done, check it's not a faulty lamp by running it on a non-dimmed circuit.
Lamp or dimmer?
Have you tried the lamp without the dimmer circuit to see which component is causing the problem? If fitting the bulb somewhere else just make sure that it is in the same orientation.
The instructions give another mode of operation (mode 3) trailing edge - have you tried this?
I don't know what is in those dimmers, but I have a (fixed output) supply to LED downlighters in the bathroom. The set is well inside its power output range, but flashes on and off, unless there is one halogen bulb fitted.
I have tried a number of different units, but they all behave the same.
Oddly, the first one that I fitted was fine - for about 18 months, then started doing this!
No. If you turn the dimmer down to the point where the lamp dims (the first few degrees make no difference) it stays at constant level.
The instructions with it says you can set both a maximum and minimum level (it's not the first V-Pro I've bought) No problem setting a minimum level, but the max seems to stay the same.
Odd, really. I could understand problems near minimum. Or perhaps on a fully loaded circuit. But the dimmer spec is 0-100 watts of LEDs, and this is just one at 10w. Same happens with a spare bulb.
I'll have to look again, but think this is the default setting.
Got the same issue. need to replace dimmers
There are two trailing edge modes (and one leading edge mode)
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That would be my first thought, Try the other modes.
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