Re: APC sua1500 overload with no load atached

I see only mosfets on heat sink, here is board from a top.
If you can't see just tell me ic number on board and i will wrote part no....

Re: APC sua1500 overload with no load atached

HRF3205
N236
GL

[url=https://imgur.com/SCjDIH3][/url]

Re: APC sua1500 overload with no load atached

@ sam_sam_sam
Thanks for replay, i do not have leaking or popped caps. Can you give me little more info how to check secondary section of battery back up, i have only multimeter and basic knowledge of electronics, but i can handle to find short circuit if that is a problem.

@petehall347
batteries are new, but with smaller capacity, i think that UPS should work on them but it will not have long autonomy. How to check current sensing circuits?

I will post image of board, it's easier to locate...

Hello guys , here brings me problem with the APC ups 1500VA , I would love if you can help me to fix it, i saw couple of threads with similar things here.

Problem is this, when i press power button and he start self-test, it will light up overload led even if there is no any devices attach. The only way to turn it on is by interrupting the self test by disconnecting from the battery and AC, and when i connect it again, first battery than ac, it will start without a self test and work, but when i disconnect AC he will automatically overload.

I also notice when...

Re: New Members - please post your introductions here

Hi gays, i need help to repair APC ups, because i find so much information here i give it i try