Load Power-Up Test; Fault Modes - MGE UPS Systems Comet EXtreme Series Installation And User Manual

procedure. If the battery pack again fails to light at least one LED, it should be replaced.
13. Restore power to the Comet EXtreme UPS by setting the AC mains circuit breaker supplying power to
the UPS to "ON." And set all battery circuit breakers to the "ON" position.
3.4

Load Power-Up Test

1. After performing the Battery Scan Procedure above, set all battery circuit breakers to the "ON" position.
2. Allow the UPS to charge the batteries for at least three hours per battery pack. You may use the UPS while
the batteries charge, but the battery backup runtime will be reduced until the batteries are fully charged.
3. If the system configuration includes an ISO transformer switch the CB1/CB2 to the "ON" position.
4. Switch on the protected equipment, one load at a time. If the UPS beeps an alarm when you start your
equipment, the UPS may be overloaded.
5. The four LEDs on the right side of the front of the UPS
("11 through 14") show the percent of battery capacity remaining. To verify the percentage of maximum
load, depress the "Push for % of load" button.
Successful completion of the procedures above will verify that the Comet EXtreme UPS is properly configured and
ready for use.
3.5

Fault Modes

Failure of AC Input Power
Figure 3-4: LED 20 is "ON" and beeps three times.
Threshold for the low-battery shutdown warning
End of backup time
The AC-power source is outside tolerances, LED "20" is ON, the buzzer beeps
three times, unit transfers to battery power.
The low-battery shutdown warning threshold can be set by the user, with the "UPS
Driver" software. LED 20 flashes. The buzzer beeps every three
seconds.
There is very little remaining battery backup time. Close all applications
because UPS automatic shutdown is imminent.
The buzzer sounds continuously.
Press button "16" to turn the buzzer OFF.
Refer to Figure 3-1.
The equipment is no longer supplied with power.
Operation
Installation and User Manual
page 3—5