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I have a liebert NXe 20 kva ups installed at our plant and we are facing some problems with it.It is showing charger fault when charging circuit is on and also it is switching automatically from main power to bypass power.does this switching happens because of overtemparature.what should i do??

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  • 167 Answers

You need to replace the battery inside the UPS

Posted on May 23, 2011

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Gxt2-10000t230 no charge


1.check the battery voltage if it rise up,if risen its shows the batteries are charging.2.after powering mains,wait for the ups to transfer to ups on mode,then disengage the batterry breaker,ups should still continue to powerup if charger is ok but if ups shutdown during the transition,then the charger is not on.or call me 08082245266.

Jul 14, 2014 | Liebert (GXT2-10000T230) (GXT2-10000T230)...

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UPS - Battery Fault


UNINTERRUPTABLE POWER SUPPLY
Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. Including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. If one battery is faulty in a set of batteries it will causes the whole battery system to fail and indicate a battery fault. A faulty charging circuit will not charge the batteries and will also cause a fault condition.

Lower powered and cheaper type UPS are switch over types, when the mains supply fails, the UPS switches over to the battery and inverter in milli-seconds which then supplies mains power to the computer and peripherals. A faulty inverter circuit and or flat batteries won’t deliver standby power when the mains supply fails.

NOTE the power waveform from these UPS is a pseudo sine wave (i.e. not a true sine wave).

The true UPS types are usually the higher KVA units (over 1500 VA) that supply continuous mains power. The mains power is connected to a charger which charges the batteries and the inverter draws power from these batteries and converts it to true sine wave mains power to the computer equipment, therefore there is no switch over time lag when the mains supply fails.

on Dec 02, 2009 | Computers & Internet

1 Answer

Why software for clear fault on liebert ups nx 40 kva


The software allows you access the battery life monitor and reset it. It is the only way to clear the fault

Apr 29, 2014 | Liebert Computers & Internet

1 Answer

Circuit diagram liebert ups gxt6000t-230


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.

Feb 12, 2014 | Liebert UPStation GXT6000T UPS System

1 Answer

I have some liebert ups 6kva i have problem in charger circuit i find transistor 13n80 have a short circuit i replace it and replace fuse in charger board 6.3a but there still problem in charging batteries...


Hi, Thanks for contacting fixya. There could be many reasons.

1. The battery is old and completed its charge-discharge cycle.
2. The step down transformer (220/110V to 12/24V) coils got shorted inside.
3. For a trickle charger, the SCR might have gone bad.

Solution for 1. Take out the battery and charge it by another charger. You can use laptop charger, cell phone charger or any charger. You might have to do a little bit circuitry. Then after 2-3 hrs of charging see if the battery voltage goes to its peak. Use a voltmeter or multimeter to measure that. If the voltage does not goes to its peak then battery is faulty. And the charger circuit has no problem.

Solution for 2. Some times step down transformer goes wrong. Measure the output voltage by a multimeter and see if it is giving the voltage what it should be. If not then change the transformer.

Solution for 3. I don't know how to determine if an SCR is wrong. The easiest way to check is to replace it and see if the battery is changing.

Feb 02, 2011 | Liebert GXT210000RT208 10000VA...

1 Answer

Please tell me how many computers a 20 kva ups( liebert )can support.


It really depends on how large your computers are and what they actually require. A 750 W Cisco Server will require usually a 1.5Kva UPS and give you around 7-9 minutes depending on the model of UPS.

Oct 08, 2010 | Liebert 1 KVA UPS MODEL RT1000-60...

2 Answers

How many systems support for 1 KV UPS


1 KVA UPS will provide you good back up with 2 pcs simultaneously without any power fluctuations.

May 24, 2010 | Liebert 1 KVA UPS MODEL RT1000-60...

1 Answer

U p s by pass l e d flashing light


Batteries in the UPS typically last 3 to 5 years and it depends upon several factors. Including the number of times the unit must go on battery power and environmental conditions. There are usually several batteries in the UPS and while the battery voltage may show 13 volts, this may only be a float charge/voltage and a true indication of the battery voltage and condition requires the batteries to be tested under a load. If one battery is faulty in a set of batteries it will causes the whole battery system to fail and indicate a battery fault.
A faulty charging circuit will not charge the batteries and will also cause a fault condition.

Nov 29, 2009 | Liebert (PS2200RT2230) UPS System

1 Answer

Need to monitor status of Liebert 150 KVA UPS


Try to find your manual here in this site. Choose your Product Category, Product Application, Application Type and Specific Product. After that you can download the manual. Hope this helps. "http://www.liebert.com/servicesupport_pages/ProductDocumentSelector.asp"

Jun 03, 2009 | Liebert Computers & Internet

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