Emerson GXT2-10000RT208 User Manual

During normal operation, utility 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 indica-

tors display an approximate level of load in 25% increments. 

If the UPS becomes loaded beyond full rating, the fifth 

(amber) indicator will illuminate and the UPS will sound an 

audible alarm. The display template indicates the percent-

age of load (see example at right) on the UPS output.

Battery mode occurs in event of an extreme input voltage 

condition or complete utility 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 indicator will extinguish and 

the Battery indicator will illuminate to warn that a utility 

problem has occurred. Each Battery Level indicator repre-

sents a 20% capacity level. As capacity decreases, fewer 

indicators remain illuminated. Refer to 13.0 - Trouble-

shooting. For approximate battery run times, refer to 

Table 6 - Battery run times. These times 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 computers and monitors) or add the optional external 

battery cabinet.

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

begins recharging.

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