Hi! Per our UPS problem is when open 3 or 4 hours, then auto Off the UPS. please let me know what the problem. And i need to change the PCB board or just repair the PCB board? Thanks Regards

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.

as is 99% of the time , all USP on earth
the batteries are no good, now, or the lugs not clean and tight.
RIP all old battries,
you do know too that all batteries as you use them Amp./hr rating s drop in run time ,right>? less RUN TIME< on ALL UPS on earth./

Hi Sharee:
The square footage is 14 times 70 equals 980 square feet.
That would be the Floor Area.
Air conditioners sometimes need to know the building volume so if you have 8 ft ceilings you would multiple 980 by 8 to get 7,840 CUBIC FEET.
Air exchange is typically are rated at cubic feet per minute and required as "specified Air Changes per Hour.
An example for your trailer would be 1/2 air change per hour required per building code. 7,840 times 1/2 equals 3920 cubic feet per hour. Divide that by 60 to get 65 cubic feet per minute.
That would be the minimum air change capacity for your air conditioner if it was also providing required ventilation.

Hi, I have this ups as well, My personal adjustment with this ups, is I have installed 6 external Ags Number 120, 15 plates per battery, in pairs. And its working fine on my end , and yes ups is able to charge them all without over charging or any other problems. My ups Already has 6 internal batteries bank installed, attaching these external batteries has increased the backup time.

Thank You.

12V (Per Cell)

6Ah

Dimensions

151mm x 94mm x 51mm (Per Cell)
Sealed Lead acid battery - you need 2 of these!

I bought an APC 900XS UPS for $10.00. at a garage sale. I know you’re going to tell me that you take a gamble at a garage sale whether it works or not.
Please do not try to fix the device unless you are qualified electronic technician. There is high voltage and high current that is very deadly.
Before plugging the UPS in I opened the battery compartment and found the positive lead off of the battery. Took the batteries out and measured the voltage on both batteries and I couldn’t believe it, they were both good. Well at least they measured the right voltage. There are two batteries, each one is 12vdc. The real test would be to put the batteries under a load.
I plugged it in and ran for about six hours than the "Overload" LED and alarm turned on. I didn't have anything plugged into it "AC". When I first plugged it in, in the beginning I noticed the fan was running by the sound of it. But later that evening about an hour after plugging it in the fan was off. Don’t know why unless there is a temperature monitoring circuit on that heat sink and the fan wasn’t needed? After opening the unit I found a component unsoldered at one end. It looks like a capacitor or a spark gap component across the AC line. I don’t think that’s original problem. Re-soldered the component back in place. Took the board completely out and unplugged all the connectors. Again, after talking the PCB out. I didn’t see anything damage / burned. Without a schematic diagram one really can’t troubleshoot. I did noticed that (small) fan was kind-a hard to move by hand. I applied an external 24 volts to the fan. It was almost drawing 0.120 amps. The fan is rated at 0.070 amps. Took the fan apart and applied Tri-Flow (oil) to both bearings. Now the current draw has lowered. I’m wondering if the PCB has a current monitor of the fan driver, if the fan is/or requiring too much current that the unit shuts down. That heat sink that the fan is on seems to not dissipate very much heat, if any. It seems the fan is an over kill. There is a temperatures sensor mounted to the heat sink, probably to monitor the temperature of the heat sink in case the fan stops. Temporally connected everything back together. Now it’s running fine, but time will tell whether it’s going to stay running. After running four hours without any alarms, I re-assembled the unit. It’s been two days and the fan is still running and without any alarms. I haven’t plugged the computer into it yet.

Please Change Battery or Check the PCB Masfecter

I have the same PCB on my Deltec PRR2200i. I at least know a few things about the circuit now. I had 11 transistors explode on mine and am replacing them now. Sadly I have not managed to track down a circuit diagram.

Dear,

I do not know, what the problem you have in your tv M/N:HCM653W. I have the same Model samsung tv. I have image ghosting problems. As per tech I replaced the Pcb,sub.samsung part AA95-01846D, Which did not fix the problem. I still have it for sale. The power supply pcb is no longer availabe as per"Partsstore.com. I have no idea where you can find the power supply board. If you find it,please let me know.
Thanks.
DollarTech

If you can repair pcb then check overload protection section.There is some shortinng in components or ic could be demage.
Hope this be of initial help/idea. Pls post back as requested, how things turned up or should you need additional information.
Good luck and kind regards.
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