Question about APC Back-UPS CS 500 VA Refurbished (BK500REFURB) UPS System
Hi, I have a Liebert UPStation S 4.5kVA, manufacture date 1994. The neutral of the 240 split phase input broke. When the UPS came up, it first complained that the input Hz was out of spec. By the time I got to the LCD entry that told me the input Hz was 0, the damage had been done. I smelled the magic smoke. When I opened the box, the analog control board had a smoked component, probably a 1-5 watt resistor from the look of it, can't see the silk screen due to the burn residue (I can send a picture). I repaired the neutral in the feed wire, but no joy. The unit will get through the self test, ask to press "ON" to start. I press "ON" and the unit will do another 5 sec inverter test, go to the "Normal" screen with loads operating, run another 3 or so seconds, then click off and put up the "Press ON to start" message again. No alert messages are logged as the machine cycles through the above steps.
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.
Posted on Sep 15, 2009
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Aug 08, 2013 | Liebert Computers & Internet
Sep 19, 2011 | Liebert UPStation GXT6000T UPS System
May 01, 2010 | Liebert UPStation GXT 2U GXT2-1500RT120...
Mar 12, 2009 | Liebert UPStation GXT1500RT...
Feb 13, 2009 | Liebert UPStation GXT700MT (GXT700MT-120B)...
Dec 18, 2008 | Liebert UPStation GXT2700RT-208...
Feb 13, 2008 | Liebert UPStation GXT 2U GXT2-1500RT120...
394 people viewed this question
Usually answered in minutes!