CyberPower 1350AVR and 1500AVR - Repair

[pete_c]

Both are older than years old now.

Pooling info here from what I have read.

Cyberpower 1500AVR takes 4-5 days to charge batteries after test depletion.

Made an RPi Nutserver for the rack and using PFSense for the telco area with an APC.

Using Nutserver with Home Assistant.

Last week ordered

33uF 200v Rubycon Electrolytic Radial Lead Capacitors
22UF 50V Electrolytic Radial Lead Capacitors
VIPer22A "Original" ST 8P DIP IC 2 pcs

Noticed that the old Cyberpower UPS's output ~12-14VDC to the two batteries.

The new Cyberpower 1500's output ~ 27VDC to the two batterie

Purchased new batteries for the 1350 a couple of months ago and 1500 last week.

Discharged the 1500 to 10% and recharged it. Took 5 days to charge to 100%

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

I took apart the Cyberpower 1500C / AVR. It was still working but only showing 12-13VDC charging voltage. I see issues on the main board as described in previous posts.

Bottom tag on Cyberpower 1500c



Remove screw pictured and pull panel down and off. Disconnect front panel cable and two battery pack wires red and black.



Remove two screws holding case together on front of case as shown in picture and six screws on back of panel. Lift cover off to see board.







Remove red and block wire on the top of board as shown. Remove 4 screws holding the board to the case. Lift board to remove, clean and replace parts.









The Cyberpower 1500c purchased ~ 10 years ago was still working but taking a long time to charge up batteries to 100%. (4-5 days).

Next steps shown will be removal of caps and IC and clean up and replacement of parts.

Today shutting down Cyberpower 1350 which appears to be working still with 12-13 VDC on it. Replacing it with a new Cyberpower 1500 (one of two purchased in the last couple of weeks).

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

BTW here running NUT on BSD PFSense / XigmaNAS and built a couple of RPi2's which are NUT servers. Monitoring them with Home Assistant.

Here is the Cyberpower 1350 which will need to be repaired. Notice the charging voltage on it.



Here is the new Cyberpower 1500. Noticed the difference in the charging voltage.



I have yet to move the Cyberpower 1500 to the work bench. Looks easy to de solder the caps and IC. Looks difficult to clean off the old glue.

Might try..

- PCB cleaner (Electro-Wash)
- Denatured Alcohol
- Flux Remover

Maybe Acetone??

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

8th of May, 2022

Took the board out with all of its connections intact. Brought it down to the basement workbench where I have a soldering station and heat gun.

Using a large magnifying glass with lamp for all of the desoldering stuff. It is very old. Real glass and a fluorescent circular bulb on it. Got this in the 60's when tinkering with Amateur radio.



Desoldered and removed two capacitors. Easy to do once I re soldered the posts.

IC difficult.

Purchased tiny wire cutter which I did not have to nip off the IC terminals on the top of the board.

Have desoldered IC posts. This way I can grab one post at a time to remove it.

I was going to purchase a soldering vacuum but really not necessary for doing this a couple of times.

There is a lot of glue that goes between one post on IC and Capacitor.

Here is a large picture of the damaged VIPer22A. I am surprised that the UPS still kind of worked; well with 12-14VDC charging two batteries.

Still wondering best way to clean the glue off.



Here is a block diagram of the VIPer22A.



How does this provide 24VDC + charging voltage to the UPS two 12VDC batteries?

What is the purpose of the glue that is there?

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

Update 10th of May, 2022

Got my little wire clipper today.

Clipped the top 8 IC pins with the wire clipper. Chip was burnt and brittle.

Using a small needle nose pulled on pins as I de soldered them.

Closes pin to capacitor did not have any solder on it and fell off.

Using a pin to make sure that there was no solder in the holes.

Using an exacto blade lifted the glue off in one chunk. Fell off.

Cleaned top of board with alcohol.

Typically have taken pictures of projects using my digital SLR. This is the first time I have used my phone to take pictures like this.

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

11th of May, 2022

Installed IC and caps today. Put the board back in the case and put the case together.

Plugged it in and it showed a 72% charge. 2 hours later it was at 100%.

The battery voltage showing is what each battery is for the older 1500 and 1350.

Will test the Cyberpower 1350. It did charge fine with new batteries about a month ago. Most concerning was the battery voltage being 50% of what the new Cyberpower 1500's show.

This endeavor had me making RPi Nut Servers (with spare RPi's).

A big thanks to all of the forum users here and authors of the Cyberpower UPS repair posts.

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

12th of May, 2022

Just a quickie note between NUT values on the older Cyberpower 1500 and new Cyberpower 1500.

NUT Values

Battery Voltage

Old Cyberpower Battery Voltage 13.7 V indicates voltage per battery

New Cyberpower Battery Voltage 27.2 V indicates total battery voltage of two batteries.

Output Voltage

Old Cyberpower output voltage ~ 120 VAC

New Cyberpower output voltage ~ 137 VAC*

* This is a NUT issues which has been documented. Using Cyberpower Powerpanel in Windows or Linux will show ~ 120VAC.

The Cyberpower 1350 has no load on it for testing. Today unplugging it and will let it run down the battery until it shuts off. Then will power it up to see how long it takes to recharge the battery.

0800c time - unplugged Cyberpower 1350.
status On Battery Battery Discharging
Cyberpower-1350 Battery Voltage 12.9 V

Note Battery voltage immediately dropped from 14V to 12.9V

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

13th of Friday, May 13, 2022

I let the Cyberpower 1350 discharge to around 60% (after 5 hours) and plugged it back in to an outlet. A few hours later it was at 100% charged.

Thanks again to the forum users for providing much needed info on repairing the Cyberpower 1500 UPS.

[sam_sam_sam]

Re: CyberPower 1350AVR and 1500AVR - Repair

Thanks for the write up about the the repair issue that you were having with these units

Batteries should be wired in series to get 24 volts now for the one that 12.something pre battery it just has a tap on the circuit board to show you the voltage on each battery ( interesting )

A few more items that were saved from the landfill

Good work on these repairs

[pete_c]

Re: CyberPower 1350AVR and 1500AVR - Repair

Thank you for the opportunity to document this endeavor here on the forum. I learned a lot.

Here is a quickie overview of the NUT servers running and display using Home Assistant.

Most power consuming devices on the rack today are Russound distributed audio amplifiers and the XigmaNAS box #4 (8 SAS drives using a Xeon motherboard).

[silicon11]

Re: CyberPower 1350AVR and 1500AVR - Repair

Did this repair today replacing the two 33uF 200v and one 22UF 50V Capacitors and the VIPer22A DIP IC. Seems to work as normal again. Thanks everyone in this thread for the help.

[steve_l]

Cyberpower CP1350AVRLCD UPS alarmed for low battery. New batteries were purchased, The old batteries were removed and still had 23V. Was able to connect them to a variable supply and charge them up to 28V, When replaced in the UPS it would perform self test, but the battery life kept going down and there was no sign of charging. After much web searching found this thread. Have ordered the recommended parts.

[sam_sam_sam]

Cyberpower CP1350AVRLCD UPS alarmed for low battery. New batteries were purchased, The old batteries were removed and still had 23V. Was able to connect them to a variable supply and charge them up to 28V, When replaced in the UPS it would perform self test, but the battery life kept going down and there was no sign of charging. After much web searching found this thread. Have ordered the recommended parts.

Welcome to the forum
Please let us know if you were successful repairing your battery backup

[steve_l]

Waiting for parts to ship. Noticed the darkened PC board under the VIPer22A DIP IC under both my photos and pete_c. Does this part or something nearby run that hot? Would some type of heat sink or additional air flow help?

[pete_c]

It might. I never did anything but replace the DIP IC. Still running fine today.

[steve_l]

Parts arrived today, removed the caps as a confidence builder. 33uF was easiest to remove tested ok on LCR so put it back in, 22 uF came out and had a very low value under 1 uf. Replaced with new part. Was not wanting to remove the 8 pin VIP so plugged in the batteries and powered it up and it appears to be charging. Looked like there was 25 kHz +dc near the 22 uF. Have noticed the fan only runs when on battery power. Thanks for the valuable UPS repair info.
Has anyone tried using LiFePO4 batteries in UPS?

[pete_c]

Great news steve_l!!!

[steve_l]

Have another cyberpower ups with same symptoms. No errors but just does not seem to be charging

[steve_l]

The 2nd UPS Cyberpower a CP 1500 has a very similar PC board but has a larger transformer. Using LCR meter the 33uF cap tested ok in circuit at 30 uF the 22uF tested at 3 uF in circuit. Replaced 22uF but only measured 14 V on it with power on. Removed the Viper 22 IC and lost C25. From various Viper 22 circuits found online, it appears to be 47 nF between FB and Source. Have ordered a smd cap assortment of 0805 size parts. Will try cleaning the ic pin holes with a pin.

[pete_c]

Keep us informed Steve.

Here keeping up with the honey doo list. Wife wanted an outlet in one of the closets for her battery powered vacumn cleaner. The house is all conduit (which I like) and I ran electric from the basement up. Also put another outlet next to the mirror in the bathroom. That was a PITA.