APC Galaxy 3000 UPS alarms

Please tell me how to correct two alarms on APC Galaxy 3000 UPS:
#1: Cooling fault (Cooling liquid level is low)
#2: End of batt service life

Due to COVID, the service engineers in Schneider local (region) are resigned, nobody can help us to resolve two issues above.

For #1, do we have to re-fill some liquid to clear the alarm? What kind of liquid is in use?

The Galaxy 300 is a discontinued model.
Since the batteries are at their end of life. I would look for a new unit.
More cost effective.

TWS said:

The Galaxy 300 is a discontinued model.
Since the batteries are at their end of life. I would look for a new unit.
More cost effective.

Click to expand...

55 pieces of battery, each 12USD, are still much cheaper than new unit.