Uninterruptible Power Supply - UK Vintage Radio Repair and Restoration Discussion Forum

Nymrod121 · 30th Sep 2013, 8:53 pm

I was recently given a 1300VA UPS. Manufactured by "Best Power Corporation Inc." the model number is 1.3KVA DWN (UK - 240V version) and built in 1996.

It's in a matt black steel box about the size and proportions of a PC tower (but *considerably* heavier due to the weight of the transformer).

The unit is not responding to treatment i.e. despite 2 x new 12V batteries there are no indications from the front panel and the self-test is inoperative.

Google searching reveals that two company take-overs later (and although the operating manual was fairly easy to get hold of), service information and any relevant circuit diagrams seem to have been 'archived beyond recovery' (for commercial reasons perhaps)

If anyone has experience/knowledge of this or a related beast, I'd be grateful for any help. Seems a shame to relegate it to 'boat-anchor' status ...

[mods, please feel free to relocate this if needs be.]

Thanks in advance

Guy

Aub · 30th Sep 2013, 9:05 pm

Hi,

I repaired a similar inverter a while ago. Luckily, all that was wrong was the on/off switch had gone O/C.

Cheers

Aub

MotorBikeLes · 1st Oct 2013, 10:09 am

Years ago, we used to get many UPS units for repair. My general experience suggests they are un-repairable unless you are (a) lucky and (b) have manufacturer's service info.
The advice I gave to anybody buying a new one was to REPLACE the batteries as advised by manufacturers.
Generally, these sat under a bench, out of sight, never needing to do anything as there were no mains failures. The batteries ran well past there "replace by" date, after which they started to bulge as they dried out. Then there was a power failure, which they failed to deal with, so they were brought in for repair.
I then offered the choice of buying new batteries, with the probability that they would still not work, or buying a new unit, and ensuring battery replacement when scheduled by manufacturer.
I had one customer who had regular battery change, but most just bought a new one untill it happened again 5 years later.
Les.

30th Sep 2013, 8:53 pm	#1
Nymrod121 Nonode Join Date: Apr 2012 Location: Worcestershire, UK. Posts: 2,052	Uninterruptible Power Supply I was recently given a 1300VA UPS. Manufactured by "Best Power Corporation Inc." the model number is 1.3KVA DWN (UK - 240V version) and built in 1996. It's in a matt black steel box about the size and proportions of a PC tower (but considerably heavier due to the weight of the transformer). The unit is not responding to treatment i.e. despite 2 x new 12V batteries there are no indications from the front panel and the self-test is inoperative. Google searching reveals that two company take-overs later (and although the operating manual was fairly easy to get hold of), service information and any relevant circuit diagrams seem to have been 'archived beyond recovery' (for commercial reasons perhaps) If anyone has experience/knowledge of this or a related beast, I'd be grateful for any help. Seems a shame to relegate it to 'boat-anchor' status ... [mods, please feel free to relocate this if needs be.] Thanks in advance Guy __________________ "What a depressingly stupid machine." [Marvin: HHGTTG] Last edited by Nymrod121; 30th Sep 2013 at 8:54 pm. Reason: tautology

30th Sep 2013, 9:05 pm	#2
Aub Nonode Join Date: Mar 2005 Location: Nuneaton, Warwickshire, UK. Posts: 2,037	Re: Uninterruptible Power Supply Hi, I repaired a similar inverter a while ago. Luckily, all that was wrong was the on/off switch had gone O/C. Cheers Aub __________________ Life's a long song, but the tune ends too soon for us all.

1st Oct 2013, 10:09 am	#3
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Uninterruptible Power Supply Years ago, we used to get many UPS units for repair. My general experience suggests they are un-repairable unless you are (a) lucky and (b) have manufacturer's service info. The advice I gave to anybody buying a new one was to REPLACE the batteries as advised by manufacturers. Generally, these sat under a bench, out of sight, never needing to do anything as there were no mains failures. The batteries ran well past there "replace by" date, after which they started to bulge as they dried out. Then there was a power failure, which they failed to deal with, so they were brought in for repair. I then offered the choice of buying new batteries, with the probability that they would still not work, or buying a new unit, and ensuring battery replacement when scheduled by manufacturer. I had one customer who had regular battery change, but most just bought a new one untill it happened again 5 years later. Les.