Question about Tripp Lite Internet 750U (internet750u) UPS System

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Sometimes, during the night the overload/check battery light comes on and stays on, to repair or correct the problem I've had to unplug the unit and also disconnect the battery before correcting. As of today none of the above solution corrected the same problem. I've purchased a surge protection power strip to run the computer but would like to repair the battery backup unit, any suggestions

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Where is the ecm ground on a 2008 gmc sierra


have you had the battery checked for holding charge ?have the alternator checked for charge rate if battery is good , you mention happening at night when using lights which will put a drain on a faulty battery/alternator more so than during day

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SUA3000RMI2U won't carry load


Did you run this test without AC input?
Also what happens when you cut off the AC mains without any load connected to it? Will the UPS continue to run or does it switch off as well?

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My 2005 Chevy Cloroado will not start. The battery is brand new and all the lights come on on the instrument panel, but when I turn the key, all I get is a faint click.Possibly the starter relay?The truck...


2006 malibu maxx. windows wont go down. owner manual has something about if there's a system overload the windows wont work until the overload is gone. i have to cut the radio off and a.c. when aobut 15mins. sometimes this is work. problem is i can't wait 15mins with the windows up and no a.c.

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2 Answers

Tripp Lite OMNI 1000 LCD will not stay on


Turn UPS on: Press and hold the ON/OFF button for one second.
Run a Self-Test: Press and hold the MUTE/TEST button for two seconds (until alarm beeps several times).
The test will last 10 seconds. All LCD Display icons will be illuminated and the alarm will sound.
If the fault icon remains lit, the battery-supplied outlets are overloaded. Unplug powered devices until you remove the overload.
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1 Answer

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You may have the polarity backwards on the tow brake control unit. Or should I say on the lines coming out of it.

Check your polarity with a multimeter and see whats what.

Have you had to fix or replace any other light fixtures on your truck? These might also be worth checking for polarity flips.

Be sure to check your power supply from the truck to the control unit and be sure you arent wired for power in series instead of parallel.

Oh...and if this problem just occured out of the blue...suspect the tow brake control is faulty. Go to your trailer supply store and borrow one to test.

Good luck and be careful!

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1 Answer

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Unfortunately your TV will need to be serviced. You may take the unit back to the retailer of purchase to arrange for repairs.

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2 Answers

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1 Answer

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All window unit compressor have a thermal breaker mounted on it. It is to protect it from overload. On a hot summer compressor work harder to keep us cool. Sometimes this thermal breaker fails for good. Unplug the ac. Open it, on the compressor there is a bulging thing sometimes cover with rubber. Thats the thermal breaker. Check its continuity. If you don't have an ohmeter, just byspass the two terminal of the thermal breaker with wire. Plug it in, but be carefull, turn on your ac. The compressor should come on.

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2 Answers

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I have two comments to make about the drained battery that we found out...

1. The On-Star system stayed on when its suppose to shut-off once you shut off the engine and open the door. The green lite on on the unit is really hard to see during the day, but easly at night. I let the car sit over night and the next morning the unit was still active... hence draining the battery. The On-Star is using the same fuse as the dome lights. So to reset... with the door open pull the fuse, close the door insert the fuse, you should here a relay switch click. Open the door a wait for the dome lights to come on... the On-Star unti will not and should not unitl the car is started. You may need periodically keep on eye on this.

2. The other related problem is the radio fuse which is also identified as a battery guard. Not sure what that means or does yet... but the radio on-off situation seems to have started when I didn't replace the battery cover, so I'm wondering if the negative terminal is shorting out on the car. I'm getting a new cover to see if this corrects the problem... I know its sounds strange but why is there a battery cover to begin with.

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