20 Most Recent APC Back-UPS 400VA (BK400) UPS System Questions & Answers

10.3v during test, BAD THIS. night lite is 1/4watt LED , useless (mostly) as a test use 100watt desk lamp (old skool(sic) not led) the kind of lamp that burned grandma's hand/ see? that battery is no good or was never charged up up but 13.7v proves it was.(kinda) a battery has many failure mode. one is dead (0v) or at 10vdc all the time cell shorted or dead open cell 1 of 6) or acts like 6 , hearing aid batteries, in series. and 100% end of life and useless now and common after 3 year old or discharged deep 300 times, in your mind imagine old cells , shrinking ! not dead, not good but shrinking and amp/hour is not 7 but 10 times less, called EOL, end of life. dead weak shorted intermittent and all are EOL (bat 101 end) always try new batteries or learn how to bench test hem ask. the old car lamp test. https://www.pcdied.com/UPS/SMT-750/APC-SMT.html#battery_test

sorry, but that cannot be done. the UPS output section is designed from the Transformer back to accept 24 volt... Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/lisa_52daba487e5b4d53

Hi,

Your problem dated 12th Jan 2011 was re-posted today. If it has been already resolved, kindly ignore this message.

Thanks.

Hi,

Your problem dated 12th Jan 2011 was re-posted today. If it has been already resolved, kindly ignore this message.

Thanks for using FixYa

uninterupted power supply

It sounds like you have a computer with an Active PFC (Power Factor Correction) Power Supply.

Back-UPS units, when running on battery power, output a Modulated / Stepped Sign Wave. Active PFC Power Supplies are NOT compatible with this pseudo-sign wave power, which is the reason it will not stay running.

You need a Smart-UPS unit, capable of delivering a true sign wave when on battery output.

I have the same problem with an apc smart-ups VS 650.

 

New batteries - charge in batteries is good (also tested under load).

 

When AC power fails, no power is supplied to PC connectors by the UPS.

 

UPS self test works fine. UPS does not report any problems via software - Power Management under Windows XP.

Depend on model. For 600VA and above Go to APC site and check model of replacement battery. Peel open the front plastic panel and unscrew 2 screws of metal panel. Batteries can be slid out and replacement done when PC is online. Only two wires to disconnect and connect.

There is no data on it, just a picture on Amazon India. Contact APC or Newegg direct. Look at the label on the rear of the hub as it may have the input voltage https://www.google.com/search?q=apc+usb2hub-7p-1v+replacement+power+supply ..

I would replace batteries, they do not have a long life. beeping The Back-UPS product has entered a low battery condition - This alarm indicates that the UPS has reached a Low Battery condition and will soon shutdown. The UPS can only operate on battery for a limited amount of time. clicking copy and paste link https://www.apc.com/us/en/faqs/FA158813/

It means it was Event number 255 and the next one will be Event 266. You can read them on the computer is is connected to. If the beeping is annoying, you can reset it. https://www.apc.com/us/en/faqs/FA156611/#__highlight

You can purchase electronic components, such as the GP4063D/IR214 transistor, from various electronic component distributors such as Mouser, Digi-Key, Arrow Electronics, and more. You can also check with local electronics retailers or online marketplaces such as Amazon or eBay. It is best to check the availability of the specific component with multiple suppliers to ensure that you can get the component you need in a timely manner.

you to www.apc.com, choose the country you are in, go to product and services, choose the model you have than check what ever you need for the product you have chosen, good luck

I say yes he manual shows ,setting sensitivity here. the sound like charger fail. Inside. inverter works, did you let it charge overnight first. and disable the beeper if annoying. is AC line voltage low? that too can beep. is this USA model 120vac or outside USA> also if the UPS is for another country that will be bad. 650EI , is not the E means European version"??? why skip country. >? and matters huge that. EI is 230vac version, and will be wrong used in 240vac countries and worse. yellow led only blink is low line AC as the manual tells my guess you bought the wrong UPS?> v2 docs but not told version page 2. https://download.schneider-electric.com/files?p_Doc_Ref=SPD_AHUG_990-9237_EN&p_enDocType=Quick+start+guide&p_File_Name=BU+UM+990-9237B+MN01+EN.pdf

none officiallysome rare versions leak out, try googling for leaks there is no other way to find leaks, (confidential docs)

APC.com have many here. there are fuses inside that blow too. not just the rear breaker. fails with NO Loads cables connected at all? 1: batteries shorted or dead. short overload it . there is a battery fuse, easy or hard to find ,easy on my loved smt750C. the true model of you UPS is not front stamps but the rear label tells the truth. 2: turn it on with not batteries yet, some turn on with error light or on mine LCD hard text errors,. no bats. 3: that is about it besides bad PCB. ES-700 those pan-cake UPS. sure. batteries do fail for sure out of the blue. (plates inside can short) out of the blue. or one cell goes dry and open and dead. the battery fresh pulled will read 13.0vdc. (good UPS) not 10 not 1, not 0 13. or 12.8v min. rested 5 hours post charged. the brain inside (firmware) is not very smart. it see's any errors it does not like and turns off fast. blink of eye fast . it can. shorts , or battery seen shorted. or blows fuse, deep inside on PCB up to 400volts inside do not touch that with hands, lethal are you on 240vac? we are 120v here.

let it charge overnight, (new real or new from ebay not new) never assume it is charged new. make sure rear AC circuit breaker on it is not tripped makes sure battery fuse not blown make sure battery lugs not rusty. learn how to bench charge any AGM battery like this at 3amps max, ? (AND ATV CHARGERS IS WOW HERE) 2004 UPS, many were recalled for not having fuse. on the battery feed. and cause smoke. why use 15-04 -11 year old UPS>? MOST THAT OLD HAVE BIG PROBLEMS.