Maintenance
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6.2 Battery Charging
The batteries are valve-regulated, nonspillable, lead acid and should be kept charged to attain their
design life. The Liebert
®
GXT3
™
charges the batteries continuously when it is connected to the utility
input power.
If the Liebert GXT3 will be stored for a long time, Emerson recommends connecting the UPS to input
power for at least 24 hours every four to six months to ensure full recharge of the batteries.
6.3 Precautions
Although the Liebert GXT3 has been designed and manufactured to ensure personal safety, improper
use can result in electrical shock or fire. To ensure safety, observe the following precautions:
• Turn Off and unplug the Liebert GXT3 before cleaning it.
• Clean the UPS with a dry cloth. Do not use liquid or aerosol cleaners.
• Never block or insert any objects into the ventilation holes or other openings of the Liebert GXT3.
• Do not place the Liebert GXT3 power cord where it might be damaged.
6.4 Checking UPS Status
Emerson recommends checking the UPS operation status every six months.
• Check if the UPS is faulty: Is the Fault Indicator On? Is the UPS sounding an alarm?
• Check if the UPS is operating in Bypass mode: Normally, the UPS operates in Normal Mode; if it
is operating in Bypass Mode, stop and contact your local Emerson representative or Emerson
Channel Support.
• Check if the battery is discharging: When the utility input is normal, the battery should not dis-
charge. If the UPS is operating in Battery Mode, stop and contact your local Emerson representa-
tive or Emerson Channel Support.
6.5 Checking UPS Functions
Emerson recommends checking the UPS functions once every six months.
Back up the load data before conducting the UPS functions check. Procedures are as follows:
1. Press the Standby/Manual Bypass button to check whether the alarm and indicators are normal.
2. Press the On/Alarm Silence/Manual Battery Test button to check again whether the indicators
are On and the UPS is operating normally.
3. Press the On/Alarm Silence/Manual Battery Test button for three seconds after Inverter Mode;
the UPS should initiate battery self-test. Check to determine whether the battery is operating
normally. If not, stop and contact your local Emerson representative or Emerson Channel
Support.
NOTE
UPS function check procedures may interrupt power supply to the connected load.
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