Hi all,
I have an air conditioner outdoor control board that I'm trying to understand how it functions. In short, the board takes in 240VAC and splits it into 4 other wires, 2 of these go to power the indoor unit and another 2 go to power the outdoor unit module board. the 310VDC capacitor bank on the outdoor control board get charged up from a rectifier on the outdoor module board. Now what I can't wrap my mind around is the fact that there is a relay in between the 2 mains wires that go from the outdoor control board to the outdoor module board which is normally open, what this means in theory is that the relay can never close as the 12v needed for it's winding to energize is generated only when there is sufficient 310VDC. Unless of course the 12v needed is generated on the control board itself however I could not find a separate supply from the schematics.
Any help would be greatly appreciated. I have also included the schematics below.
https://cdn.badcaps-static.com/pdfs/...2306ad82cb.pdf
pgs.14-15 show PCB(1) -outdoor control board- AND PCB(2) -outdoor module board-
pgs.71-73 show the respective schematics
terminals P and N in the schematics are the capacitor bank terminals (310VDC)
I'm interested in this as the module board had a short on it causing the control board to go into what I presume is short circuit protection mode and I'm trying to figure out how to reset it as currently the main caps are not charging up.
Thanks!
I have an air conditioner outdoor control board that I'm trying to understand how it functions. In short, the board takes in 240VAC and splits it into 4 other wires, 2 of these go to power the indoor unit and another 2 go to power the outdoor unit module board. the 310VDC capacitor bank on the outdoor control board get charged up from a rectifier on the outdoor module board. Now what I can't wrap my mind around is the fact that there is a relay in between the 2 mains wires that go from the outdoor control board to the outdoor module board which is normally open, what this means in theory is that the relay can never close as the 12v needed for it's winding to energize is generated only when there is sufficient 310VDC. Unless of course the 12v needed is generated on the control board itself however I could not find a separate supply from the schematics.
Any help would be greatly appreciated. I have also included the schematics below.
https://cdn.badcaps-static.com/pdfs/...2306ad82cb.pdf
pgs.14-15 show PCB(1) -outdoor control board- AND PCB(2) -outdoor module board-
pgs.71-73 show the respective schematics
terminals P and N in the schematics are the capacitor bank terminals (310VDC)
I'm interested in this as the module board had a short on it causing the control board to go into what I presume is short circuit protection mode and I'm trying to figure out how to reset it as currently the main caps are not charging up.
Thanks!
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