Emerson GXT3 230V Manuel D’Utilisation

In the event of an issue with the UPS, refer to Table 6 to determine the cause and solution. If the 

fault persists, contact Emerson Channel Support. 

UPS fails to start when the 

On/Alarm Silence/Manual 

Battery Test button is pressed

UPS is short-circuited or 

overloaded

Ensure UPS is Off. Disconnect all loads and ensure 

nothing is lodged in output receptacles. Ensure loads 

are not defective or shorted internally.

Battery indicator is illuminated

UPS is not plugged in

UPS is operating from battery mode. Ensure UPS is 

securely plugged into the wall receptacle.

UPS input protection fuse has 

blown/opened

UPS is operating from battery mode. Save data and 

close applications. Replace UPS input fuse, then restart 

UPS.

Mains power is out of tolerance

UPS is operating from battery mode. Save data and 

close applications. Ensure mains supply voltage is 

within acceptable limits for UPS.

UPS has reduced battery 

backup time

Batteries are not fully charged

Keep UPS plugged in continuously at least 24 hours to 

recharge batteries.

UPS is overloaded

Check load level indicator and reduce the load on the 

UPS.

Batteries may not be able to 

hold a full charge due to age

Replace batteries. Contact your local dealer, Emerson 

representative or Emerson Channel Support for 

replacement battery kit.

Fault and Bypass indicators 

and all LED segments of 

battery level indicator are 

illuminated

UPS is overloaded or load is 

faulty

Check load level indicator and remove non-essential 

loads. Recalculate the load and reduce number of loads 

connected to UPS. Check load for faults.

Fault and Bypass indicators 

and diagnostic A indicator are 

illuminated

UPS has been shut down due 

to temperature condition; load 

is on bypass power

Ensure UPS is not overloaded, ventilation holes are not 

blocked and room ambient temperature is not 

excessive. Wait 30 minutes to allow UPS to cool, then 

restart UPS. If UPS cannot restart, contact your local 

dealer, Emerson representative or Emerson Channel 

Support.

Fault and Bypass indicators 

and diagnostic B indicator are 

illuminated

UPS internal DC bus 

overvoltage

UPS requires service. Contact your local dealer, 

Emerson representative or Emerson Channel Support.

Fault and Bypass indicators 

and diagnostic C indicator are 

illuminated

UPS DC/DC fault

UPS requires service. Contact your local dealer, 

Emerson representative or Emerson Channel Support.

Fault indicator and diagnostic 

D indicator are illuminated

UPS PFC (Power Factor 

Correction Circuit) fault

UPS requires service. Contact your local dealer, 

Emerson representative or Emerson Channel Support.

Fault and Bypass indicators 

and diagnostic E indicator are 

illuminated

UPS inverter fault

UPS requires service. Contact your local dealer, 

Emerson representative or Emerson Channel Support.

Fault indicator and diagnostic 

A and C indicators are 

illuminated

UPS failed the battery test

Replace batteries. Contact your local dealer, Emerson 

representative or Emerson Channel Support.

Fault and Bypass indicators 

and diagnostic C and E 

indicators are illuminated

UPS has been shut down by a 

command from the 

communications port(s)

Your UPS has received a signal or command from the 

attached computer. If this was inadvertent, ensure the 

communication cable used is correct for your system. 

For assistance, contact your local dealer, Emerson 

representative or Emerson Channel Support.