Liebert powersure 1400 diagram & circuit - Powerware 9120 UPS System

go to liebert website and request for the circuit diagram or you can log what ever your fault is right here i will help you.

my problem is that when connecting and switching LEDs are lit intermittently "Fault indicator" and led A and B which means (in the manual) that is a failure of input or output short circuit n electronic technician but I do not get to any way to solve the problem. excuse my English I'm Latino

ITS WILL BE CORUPTED

maybe the batts are dead or you have failed cell or bloc.

check the batts, unit will not start without good batts charged

chek the power transistors.

Emerson/Liebert do not release diagrams, if the u nit is less than 2yrs old it is still under warranty.

The wiring fault light indicates that the polarity of your power outlet is wrong (positive and negative wires have been inverted) or that the ground is missing/faulty.

This have nothing to do with the configuration of the UPS. Unfortunately (for liability reasons), I have to tell you that the only person who can fix that is an electrician.

Just for testing, try plugging it into another power outlet elsewhere in your house to see if it is any different.

How does it react when you simulate a power lose? Unplugg it from the wall to test it to see if it turns to battery power. If the unit goes to the battery backup normally then check to see if it has a reset button on the unit. Please let me know what size unit it is.

the battery is bad, you will need to replace the battery or the whole unit. you can find batteries on ebay. just source the model number. also depends on the size of the unit. you may need to just replace it...just a better value to do it that way.

good luck
K.