Help - Weird MeanWell Issue

DesertPlants

DesertPlants

Well-Known Member
OK, this is a new issue for me. I have a driver that seems to be faulty. Curious if anyone else has seen this. I have an HLG-240H-C1750A that will not go to full power. Adjusting the Io ADJ screw does absolutely nothing. I have checked and re-seated every wire. Is this just a bad driver?
 
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1212ham

Well-Known Member
Sounds like a bad driver... Did it ever work or is it a new build? What are you driving? About what percentage are you getting? Do you have a power meter or multi meter?
 
Airwalker16

Airwalker16

Well-Known Member
They're not invincible. Contact where you bought it and get an RMA form printed and start the exchange process. Takes a while to send to them, to send to meanwell, then back to them, and finally back to you.
 
Prawn Connery

Prawn Connery

Well-Known Member
DesertPlants said:
OK, this is a new issue for me. I have a driver that seems to be faulty. Curious if anyone else has seen this. I have an HLG-240H-C1750A that will not go to full power. Adjusting the Io ADJ screw does absolutely nothing. I have checked and re-seated every wire. Is this just a bad driver?
Click to expand...
How many amps are you getting? And what is your total voltage? If the connected voltage (at the LED boards or strips) is more than the driver can supply, this will limit the current to whatever the LEDs can draw at that particular voltage.

For example, you have three QB288s in series hooked to the above driver. The driver supplies 143V max. 143V divided by 3 is 47.67V. But at 47.7V, each board draws 1400mA - so your 1750mA driver cannot supply any more than 1400mA because it is voltage limited. Turning up the Io adjustment will not make it go higher.

I used this table for reference: https://horticulturelightinggroup.com/collections/quantum-boards/products/qb288-v2-quantum-board
 
Airwalker16

Airwalker16

Well-Known Member
Prawn Connery said:
How many amps are you getting? And what is your total voltage? If the connected voltage (at the LED boards or strips) is more than the driver can supply, this will limit the current to whatever the LEDs can draw at that particular voltage.

For example, you have three QB288s in series hooked to the above driver. The driver supplies 143V max. 143V divided by 3 is 47.67V. But at 47.7V, each board draws 1400mA - so your 1750mA driver cannot supply any more than 1400mA because it is voltage limited. Turning up the Io adjustment will not make it go higher.

I used this table for reference: https://horticulturelightinggroup.com/collections/quantum-boards/products/qb288-v2-quantum-board
Click to expand...
Smart guy
 
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