Hello,
I have this outdoor ups, a chinesium product with great specs and has worked great but now it started outputting around 95v instead of the 220v like before. it also makes a weird kinda loose transformer humming. I've tried getting a datasheet or something from the manufactures but no luck...anybody has any idea what I should try and look at? or if there is some common component that is weak in these products etc...? When I switch on the inverter at the back sometimes it doesn't turn on and sometimes it does. There is a diod on the control board that lights up if the inverter is on. Relays work fine as I can hear them switching when I unplug the UPS. The passthrough mains works as well only that it outputs 93.5v now instead of 220v.
I've recorded a short video where you can hear the humming and see the diod that lights up when the inverter actually is on.
![2020-04-06_00001.jpg 2020-04-06_00001.jpg](https://www.electro-tech-online.com/data/attachments/113/113058-e6555426b34a8a09c0f043f8162798db.jpg)
![2020-04-06_00002.jpg 2020-04-06_00002.jpg](https://www.electro-tech-online.com/data/attachments/113/113059-ae6f8db7efb5fa74f9f15b0b081cdbc5.jpg)
![2020-04-06_00003.jpg 2020-04-06_00003.jpg](https://www.electro-tech-online.com/data/attachments/113/113060-dd39f8576c5258660ad4c948a4b74bd4.jpg)
![2020-04-06_00001.jpg 2020-04-06_00001.jpg](https://www.electro-tech-online.com/data/attachments/113/113061-171ee13eef5a731439abb4700971577b.jpg)
![2020-04-06_00002.jpg 2020-04-06_00002.jpg](https://www.electro-tech-online.com/data/attachments/113/113062-5989798e382636c2058aa89b23d67b3f.jpg)
![2020-04-06_00003.jpg 2020-04-06_00003.jpg](https://www.electro-tech-online.com/data/attachments/113/113063-0a3418e17d7b4de411ff33afc34c6fd3.jpg)
![2020-04-06_00004.jpg 2020-04-06_00004.jpg](https://www.electro-tech-online.com/data/attachments/113/113064-3c3f3f6acdcc3c8e5a5a2518beef5a32.jpg)
I have this outdoor ups, a chinesium product with great specs and has worked great but now it started outputting around 95v instead of the 220v like before. it also makes a weird kinda loose transformer humming. I've tried getting a datasheet or something from the manufactures but no luck...anybody has any idea what I should try and look at? or if there is some common component that is weak in these products etc...? When I switch on the inverter at the back sometimes it doesn't turn on and sometimes it does. There is a diod on the control board that lights up if the inverter is on. Relays work fine as I can hear them switching when I unplug the UPS. The passthrough mains works as well only that it outputs 93.5v now instead of 220v.
I've recorded a short video where you can hear the humming and see the diod that lights up when the inverter actually is on.
![2020-04-06_00001.jpg 2020-04-06_00001.jpg](https://www.electro-tech-online.com/data/attachments/113/113058-e6555426b34a8a09c0f043f8162798db.jpg)
![2020-04-06_00002.jpg 2020-04-06_00002.jpg](https://www.electro-tech-online.com/data/attachments/113/113059-ae6f8db7efb5fa74f9f15b0b081cdbc5.jpg)
![2020-04-06_00003.jpg 2020-04-06_00003.jpg](https://www.electro-tech-online.com/data/attachments/113/113060-dd39f8576c5258660ad4c948a4b74bd4.jpg)
![2020-04-06_00001.jpg 2020-04-06_00001.jpg](https://www.electro-tech-online.com/data/attachments/113/113061-171ee13eef5a731439abb4700971577b.jpg)
![2020-04-06_00002.jpg 2020-04-06_00002.jpg](https://www.electro-tech-online.com/data/attachments/113/113062-5989798e382636c2058aa89b23d67b3f.jpg)
![2020-04-06_00003.jpg 2020-04-06_00003.jpg](https://www.electro-tech-online.com/data/attachments/113/113063-0a3418e17d7b4de411ff33afc34c6fd3.jpg)
![2020-04-06_00004.jpg 2020-04-06_00004.jpg](https://www.electro-tech-online.com/data/attachments/113/113064-3c3f3f6acdcc3c8e5a5a2518beef5a32.jpg)