Cyberpower CP900EPFCLCD - F03 Error

[Shinjinkun]

Re: Cyberpower CP900EPFCLCD - F03 Error

Wow, that's a thorough explanation! Let me review all these values and see if I could get all these components. But at least, it looks promising
Thanks a lot for the suggestions!

FYI, I already ordered all the missing components.

I got a zener diode kit for Z1, with several values:
ZMM30V (30 V), ZMM33V (V), ZMM36V (36 V),ZMM39V (V).
Which one of them should I use? You commented it should be between 30 to 40V, but which one should do better?

Bought the S1G cause I think is in bad shape.
Got an extra 50V 47uF in case it doesn't work.

For the C15, also got a kit with loads of values, 47nF included. I hope that one should work ok.

One last comment, in case the SMD resistor 551 break or something, also got a resistor kit but, the kit only contains a 560 OHM, instead of the 550 OHM that the 551 should have. Because they have a 5% tolerance, I suppose it should work too...

I will let you know once I receive all the components. Thanks again!

[Shinjinkun]

Re: Cyberpower CP900EPFCLCD - F03 Error

Well, if you can find a schematic for the UPS, that would be great. But if not, the VIPer22a datasheet does contain a lot of useful information.

VIPer22a datasheet:
https://cdn.badcaps-static.com/pdfs/...55464b79b4.pdf


Z1 is not that critical for the operation of the VIPer22a - it's there for protection, in case V_dd goes too high. Since the VIPer22a IC is rated for up to 50V on the V_dd pin (though operating, it is specified for 9-38V), my guess would be that a Zener anywhere in the range of 30-40V should be safe to use without possibly clamping too early (if the transformer's primary auxiliary winding - the winding that supplies V_dd to the IC via diode D5 - has a really high output, for example.)

Just make sure diode D5 is good or replace it. Here, a fast-recovery 40-100V rated diode should work fine.

Also, don't forget to replace the small 50V, 47 uF cap! That's your startup/run cap.

As for ceramic cap C15... this one might be a little more challenging to guess. I don't see anything in the VIPer22a datasheet that specifies how to calculate it. That said, I looked up images of random VIPer22a schematics, and the value for the capacitor in this spot varies anywhere from 220 nF to 10 nF. My guess would be that 47-100 nanoFarads will be OK. Just know that the higher the capacitance, the slower the response of the feedback to the IC will get. This could be a good thing or a bad thigh, of course. From what I'm seeing from the online picture schematics, 47 nF is the most common value, so perhaps go with that. As for voltage rating... since pin 3 of the VIPer IC gets is current from the V_dd supply through an optocoupler's output transistor, the voltage will probably be lower. Nevertheless, 35V-50V rating of the cap should be sufficient.

Wow, that's a thorough explanation! Let me review all these values and see if I could get all these components. But at least, it looks promising
Thanks a lot for the suggestions!

[momaka]

Re: Cyberpower CP900EPFCLCD - F03 Error

Do you mean the datasheet for the Viper22a or the board? I am pretty inexperienced in electronics, so I'd appreciate if you could share a link to follow, please.

Well, if you can find a schematic for the UPS, that would be great. But if not, the VIPer22a datasheet does contain a lot of useful information.

VIPer22a datasheet:
https://cdn.badcaps-static.com/pdfs/...55464b79b4.pdf

So, long story short, I need the specs for the white capacitor (C15) and the zener diode (Z1) in order to buy them to try to replace them.

Z1 is not that critical for the operation of the VIPer22a - it's there for protection, in case V_dd goes too high. Since the VIPer22a IC is rated for up to 50V on the V_dd pin (though operating, it is specified for 9-38V), my guess would be that a Zener anywhere in the range of 30-40V should be safe to use without possibly clamping too early (if the transformer's primary auxiliary winding - the winding that supplies V_dd to the IC via diode D5 - has a really high output, for example.)

Just make sure diode D5 is good or replace it. Here, a fast-recovery 40-100V rated diode should work fine.

Also, don't forget to replace the small 50V, 47 uF cap! That's your startup/run cap.

As for ceramic cap C15... this one might be a little more challenging to guess. I don't see anything in the VIPer22a datasheet that specifies how to calculate it. That said, I looked up images of random VIPer22a schematics, and the value for the capacitor in this spot varies anywhere from 220 nF to 10 nF. My guess would be that 47-100 nanoFarads will be OK. Just know that the higher the capacitance, the slower the response of the feedback to the IC will get. This could be a good thing or a bad thigh, of course. From what I'm seeing from the online picture schematics, 47 nF is the most common value, so perhaps go with that. As for voltage rating... since pin 3 of the VIPer IC gets is current from the V_dd supply through an optocoupler's output transistor, the voltage will probably be lower. Nevertheless, 35V-50V rating of the cap should be sufficient.

[Shinjinkun]

Re: Cyberpower CP900EPFCLCD - F03 Error

The datasheet for those IC's contains implementation examples.
Usually the manufacturers follow those quite closely so that is a good starting point.

Do you mean the datasheet for the Viper22a or the board? I am pretty inexperienced in electronics, so I'd appreciate if you could share a link to follow, please.

[Per Hansson]

Re: Cyberpower CP900EPFCLCD - F03 Error

The datasheet for those IC's contains implementation examples.
Usually the manufacturers follow those quite closely so that is a good starting point.

[Shinjinkun]

Hello guys.
Please help me fix this UPS!

I got this UPS from a guy on Ebay. It stated that it wasn't working, but didn't specify about the F03 error.
Anyway, when I received it, I supposed that just the battery was dead, a quick fix. Changed the battery, connected the device, and everything worked without issues. However, three days later, the UPS started beeping, showed the F03 error, and had to switch it off, as I didn't know what was going on.

Going forward, I researched about the problem, and found that it was an issue with the charging circuit. It seems that, while the battery was at full charge, the ups was working normally. It was when the battery lost part of the charge, and the circuit tried to recharge it, that the problems arised.

I opened the box, and found that a cap and the vyper22a were blown. And also, it is possible that other parts are bad, as the infamous glue was around several critical spots. I removed all of the glue, but obviously the parts need to be swapped.

I removed the blown cap and the vyper22a, but in the process, I also broke a SMD capacitor (C15). Does any of you know the capacity of the white capacitor I removed by mistake? Or if there is a way to calculate it?
Furthermore, I think the zener diode and the s1g diode may be also dead. Any idea of the values of the piece were I to buy it? So far, I ordered the capacitor, the vyper22a, and some smd capacitors, but I don't know about which values I need.

So, long story short, I need the specs for the white capacitor (C15) and the zener diode (Z1) in order to buy them to try to replace them.
Could you give me some ideas, please? I am really in the dark right now What other components should I test? Is there anything else I could do?

Thanks everyone!