Minuteman Pro 700 UPS - Beeping Problem

Pro700E Front Panel

Minuteman Pro 700 UPS Problem

A couple years ago, I had a $3000 phone system blow up because of an electrical surge. The lesson was to have an Uninterruptible Power Supply as a power source for highly valuable equipment. We bought the Minuteman Pro 700E UPS. It is a pretty standard 700VA power management solution with 4 backup/surge outlets and 2 surge only outlets.

It has been about 5 years now and I'm sure that unit has saved us more times than I can count. If you have ever had a business in an industrial center you know the power goes down at least 3-4 times a year....and that's in an area without many electrical storms.

I can think of a few times that we were able to run our phones when everyone else was down because we had a UPS backup system. It was a terrific investment.

Pro 700E UPS Side View

Minuteman PRO700E Rear Panel

Trouble Lights?

Fast forward to about 6 months ago. We started hearing an occasional beep in the office. When I checked the fault lights and trouble lights, nothing was on. I suspected it was that we were having surges in the building and the UPS was telling me it had to jump in and correct the problem. Since it only happened about once every other week, I didn't pay much attention.

Short Term Fix

As time went on, it happened more frequently but I had gotten in the habit of ignoring the beeps. I hadn't noticed the increase in frequency and it was not until my trusty Minuteman Pro 700 UPS started beeping about 3-4 times a day that I decided to investigate.

This time when I looked at the lights, sure enough, I had a weak battery indicator light on. I reset the unit and the problem went away. We started having a policy of turning off the power to the unit to give it a rest over the weekend. It worked for about a month...then the beeps started happening occasionally.

Replacing The Batteries

Time to do a little research. Found a manual online for the Minuteman Pro Series UPS. There is a bad/weak battery test. Did the test and it was time to replace the batteries.

Seems that the batteries have a fixed lifetime. We were on year 5 do I didn't have much to complain about. The manual also included a section on replacing batteries so now I just need a source for replacement batteries.

In doing a little Internet research, it seems there were a couple of places to find batteries. Of course there were batteries at the manufacturer. Turns out there are a number of other places, including Amazon. For the Minuteman Pro 700 UPS system the model number used was the B00009 - 12 Volt DC 12 Amp Hour battery.

Purchase Recommendation

The biggest issue I found when searching for replacement batteries was the cost of shipping. As the batteries are heavy, it becomes a factor. I found that you need to look at total price including shipping.

The Replacement

There was no real problem replacing the batteries. The instructions were pretty well written. I did not attempt the 'hot swap'. I just turned everything off and then charged it up over the weekend. No sense tempting fate. Good luck and I hope this helped.

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