Quote Originally Posted by LedElk
Major malfunctions in elktown!

I just returned from a 5-day trip and the "pipe-light" is out... I checked the drivers, but they're ok. The LEDs glow a tiny amount when powered.

I also checked the thermal switch/pump circuit and they work fine as well...

Next thing I guess is to test the LED-string and exclude one led after another until I find the ones that are burnt out or whatever.

My girlfriend has been watching the place and she casually mentioned something about the fire-alarm (on top of the cab) going off this morning... WHAT!?

I hope the circuit stops when one LED fries and the rest are good.

Need some help on this one!

Plants are fine, btw. Pulled a male, so down to 4.

I doubt if it's the leds.
There would be no glow at all if one is open.
If one shorts though, it will drop resistance in that string and overwork the driver.

About the only way you can have a low glow is for one led to pop and leak current, essentially, become a resistor.
That would be very rare.

The smoke alarm beep suggests that a driver is hosed.
When a driver dies, it's not unusual to show some leakage current.
So, if all leds glow with the same intensity, or lack thereof, it's a fried driver.

All decent drivers have a thermal shutdown as well.
Have you let it cool down and tried to restart?

If it is the driver.
Thermal glue the new driver to a heatsink to prevent recurrence.
That and overspec it to run it cooler.

An innovator's path is strewn with hazards.
Dragons to be slain.
Tilting windmills is great fun.
But does involve some pain.

Aloha,
Weezad