Liebert gxt2u user manual Battery Mode Operation, Battery Recharge Mode

Operating Instructions

6.3BATTERY MODE OPERATION

Battery mode occurs in event of an extreme input voltage condition or com- plete utility failure. The battery system supplies power through the DC to DC converter to the inverter to generate power for the connected load.

AC INPUT BATTERY UPS ON BYPASS

Battery Mode Operation at 80-61%

During battery mode an alarm sounds every 10 seconds. This will change to two beeps every 5 seconds when the battery runs low (approximately 2 minutes remaining, but this is user configurable). The AC Input LED will extinguish, and the Battery LED will illumi- nate to warn that a utility problem has occurred. Each battery level indicator represents a 20% capacity level. As capacity decreases, fewer indicators remain illuminated. Refer to 10.0 - Troubleshooting.

For approximate battery run times, refer to 13.0 - Battery Run Times. The times listed in these tables are approximate based on resistive load and an ambient temperature of 77°F (25°C). To increase this time, turn off non-essential pieces of equipment (such as idle com- puters and monitors) or add the optional external battery cabinet.

CAUTION

! Turning OFF the UPS while in battery mode will result in loss of output power.

If the UPS is manually turned OFF, it must be manually restarted after utility power is restored.

If the UPS is turned OFF by a communication signal or because the batteries are depleted, it will operate as selected in the configuration program for Auto-Restart (see 8.1 - Liebert GXT2U Configuration Program Abilities).

6.4BATTERY RECHARGE MODE

Once utility power is restored, the UPS resumes normal operation. At this time, the Battery Charger begins recharging.

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