Question about Liebert UPStation GXT700MT (GXT700MT-120B) UPS System

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Liebert UPStation GXT700MT fan runs continously...

Should the cooling fan run all the time?

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It is probably speed regulated, high temp speeds up fan. then low speed or off when not hot.if it does not run at all, fan or sensor defective. hope this helps you, good luck! glen. and it would be ok if it did run all the time, as it is better than not at all.

Posted on Feb 13, 2009


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I need to know too, cuz fan was very noisy. Can I cut it out ? nomal room temp around 24c.

Posted on Jul 22, 2009


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Hello gypsy6767, I spent 10 years as a Liebert Rep here in the Phoenix, Az. market! Here is a link to the Liebert GXT User's Manual -

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surprised it tried to start with amissing neutral,
this is used to reference one side of the incoming live for the control circuits
Emerson do not release diagrams, and I doubt if anybody has the correct diagram as the unit is so old. ups is really difficult to repair, even with diagrams.
I used to fix AP200 series units and I had the service manuals, they were still very difficult.

looks like your ups is toast, could be expensive but,
maybe you can find a repair tech who can get parts form other units.

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Technical daigram

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Looking for Service Manuals for the GXT Series

Try this site:

They have a large number of manuals available for download for a variety of UPS systems, including UPStation.


Feb 13, 2008 | Liebert UPStation GXT 2U GXT2-1500RT120...

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