HVAC System / LED Dimmers Not Getting Along

[A/A Fuel GTX]

Have a customer with a new home with a high end HVAC system. DC, variable speed, etc. When the system is in the cooling mode, the LED's in recessed cans throughout the house flicker randomly. The dimmers controlling the cans are LED rated. I recall a previous job awhile back where the well pump had the same effect on LED's/Dimmers. I believe the well guy had to put some kind of filter on the constant pressure well pump to alleviate the problem. Has anyone else had this problem? TIA

 

[ramsy]

DC, variable speed, (cause) LED's in recessed cans throughout the house flicker

Try moving VSD breaker & Neutral wire closest to service/feeder, and LED sub-panel/branch wires at opposite end

 

[fastline]

I work with electronics. Personally, I'd be putting a scope on that as it will certainly identify the issue. Other reality is it's likely the dimmers as their output becomes a function of input. Small change on primary, you see it in the LEDs. many ways around this issue. None that can be defined without measurements but I've used secondary LC network to snub and support the voltage bumps. Problem is it takes calculations and such. There might be filters out there for this. I see no reason you could not deploy on primary side. Other is get better dimmers as IMO, they should be designed for exactly this.....

 

[herding_cats]

Put a line reactor on the HVAC system. Both indoor unit and condenser. Size by Amperage pull plus 20%. They have cheap LED lighting as well.