Inherited a four year old Matrix 5000 with a control unit and 5 battery units. Panel reads "no battery communications" but the UPS appears to be functioning for at least short power outages. Do we need new batteries?
You will get that message when the communications cable is not hooked up. It looks like a phone line and daisy chains from one battery to another and ends at the Matrix Control unit. If you have those installed and it still says no communication the system need service.
If you have a volt meter you can check the voltage from each battery at the plug. It should be 48 volts or more, usually on a fresh battery pack it will read 54.0+ volts.
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ccowl, APC has a great website. Have you tried it yet? The knowledge base they have on their products is huge. The cable you are speaking of may just be for monitoring battery voltage status, but that is only a guess. The interconnect cable could be a proprietary APC cable and only APC knows how it is wired "end to end" !!! 12fixlouie
Have you change the battery? Note: Matrix UPS need to be calibrate after changing batteries or reset the Smartcell communication board. to make sure that the UPS would detect that you already replace it with the new battery
It is likely the battery. These batteries are designed to last 3-6 years in a UPS. The good news is that if it is the battery, it is completely user replaceable and you'll have a Cyber Power unit that works just like new with a new battery. What may have happened is that the battery was weak, and you may have had a slight dip in the AC power. This caused the Cyberpower unit to switch over to the weak battery which couldn't handle the load. The unit then turned off. When you press the "ON" button, the unit will go through a self-test that checks all of the components and the unit will not turn on and be functional unless all of the components come back with a PASS, including the battery. If possible, test the battery with a voltmeter, it should read around 13.5, but not lower than 11.5v DC. However, with the unit over 3 years old, it almost certainly the battery. Here's a link to a replacement battery for the CP685AVR: http://www.batteryinternational.com/cyber-power-cp685avr-ups-battery-ups-batteries-f1.html
Make sure that the battery communication cable is connected the the battery output communication of your smartcell. If Im not wrong maybe you connect the communication cable on the input of the smartcell communication board.