HP UPS R5500 XR wont start

[Alex__G]

my old R5500 XP was running fine, but recently batteries died. So i have bought new cells, reassembled modules, controlled voltage on both (each half around 64V * 2 half * 2modules gives me what i need in EU) Inserted modules and tried to start UPS, but no luck. Actually it started but green main led became red in 1 or 2 sec and after that ups shut down. Tried to wait for battery to charge (few days), no luck. Tried to circuit and battery breaker few time, no luck.

What it could be, please?

[active-Pro]

Hi Alex,
You might want to try and replace the EM itself as that might be faulty and not letting the unit to power on.

[Alex__G]

what is EM, please?

[active-Pro]

Sorry, should have mentioed it , it is the Electronics Module in the UPS.

[madhuiss]

But please ensure the batteries have the Next Recharge date after todays date. If the Next recharge date is missed and the UPS was lying unusued then Possiblyt he Batteries may also be at fault. I would say get both EM & the batteries for the UPS. That should get the UPS up and running.

I am an HP employee.
Regards.

[Alex__G]

Batteries are fresh, new from the supplier. But how could i reset EM to start working? I just changed batteries, i did nothing with electronics or software.

Thank you