Liebert GXT2-6000RT230 User Manual download pdf (Page 24)

Operating Instructions

9.0 OPERATING INSTRUCTIONS

9.1 Normal Mode Operation

During normal operation, mains power provides energy to the

UPS. The filters, power factor correction circuit and the inverter

process this power to provide computer grade power to connected

loads. The UPS maintains the batteries in a fully charged state.

The four green load level LEDs indicate an approximate level of

load in 25% increments. If the UPS becomes loaded beyond full

rating, the fifth (amber) LED indicator will illuminate and the

UPS will sound an audible alarm. The display template indicates

the percentage of load (10% of load shown in example) on the UPS

output.

9.2 Battery Mode Operation

Battery mode occurs in event of an extreme input voltage condition

or complete mains failure. The battery system supplies power

through the DC to DC converter to the inverter to generate power

for the connected load. 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 illuminate to warn that a mains problem

has occurred. Each battery level indicator represents a 20% capac-

ity level. As capacity decreases, fewer indicators remain illumi-

nated. Refer to 12.0 - Troubleshooting. For approximate battery

run times, refer to Table 6. These times are approximate, based on resistive load and an ambient

temperature of 25°C (77°F). To increase this time, turn off non-essential pieces of equipment (such as

idle computers and monitors) or add the optional external battery cabinet.

9.3 Bypass Mode Operation

Bypass mode occurs when the OFF button is pressed once while

the UPS is in Normal Mode. During bypass operation, mains

power provides energy to the UPS. The mains power bypasses the

inverter and provides power for the connected load.

The four green load level LEDs indicate an approximate level of

load in 25% increments. If the UPS becomes loaded beyond full

rating, the fifth (amber) LED indicator will illuminate and the

UPS will sound an audible alarm. The display template indicates

the percentage of load (26-50% of load shown in the example above) on the UPS output.

9.4 Battery Recharge Mode

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

begins recharging.

CAUTION

Turning OFF the UPS while in it is battery mode will cut off output power.

BATTERY UPS ON BYPASSAC INP UT

Normal Mode Operation

Batteries at 100% Charge

Load at 10%

Battery Mode Operation

Batteries at 30% Charge

Load at 50%

BAT

UPS ON BYPASS

AC INP UT

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Liebert GXT2-6000RT230 User Manual Page 24

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