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I HAVE A POWERWARE 9120 MODEL NO PW9120-3000I UPS FOR SINGLE PHASE OUTPUT OF 230 VAC. RECENTLY I HAD REPLACED WITH NEW SET OF BATTERIES. NOW IT IS SHOWING " DC BUS UNDER VOLTAGE " IN UPS DISPLAY. PLEASE SUGGEST WHAT TO DO FURTHER TO RECTIFY THE SAME OPERATE UPS SMOOTHLY.
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Hi Anonymous,
I want to help you with your question, but I need more information from you. Are the batteries new? If you did recently replace the batteries in the cartridge, did you check the connections and make sure contact as being made?
Let me know!
Daniel • [email protected] • Power & Systems Innovations • 800.260.2259 • www.psihq.com
Not sure what you mean by load the batteries. Replace them? Yes. Bypass mode is typically used when servicing the unit. You can email Eaton if you like: [email protected]
Here is the legacy documentation page for the 9120 UPS:
The charger in powerware 9 series 9120 6000i ,the fan is of a quality that it fails and the heat sink does not get sufficient cooling ,it runs on 12 volt ,i replaced it with a cpu fan from a mainboard on a pc and it works perfectly now. make sure that the fan is running else the charger might go in protection or can fail due to the transistor on heat sink fails.
I've had this same issue what it boils down to is that the Power IN is not being distributed properly across the Power Outlets.
Step 1. unplug everything from the unit and power the ups down. If the alarm clears itself the UPS is mostly likely fine. if it doesn't not clear send it in for repair
Step 2. If step 1 cleared the alarm try distributing the decives across the outlets differently.
There are two inverters so two output if everything is plugged into one side (ie a power bar with 10 things plugged into it) and nothing on the other side this could cause the alarm.
did u check the fuse inside the ups?
did the ups gave the error right after u replace the batteries? or some time after.
sometimes gives the message some time after and its because the charger isn´t working properly. the charger is a spare board in the 9120, 5 and 6 KVa.
good luck
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