Operation
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NCR 4072 UPS Site Preparation, Installation, and Operation Manual S 05147374 Rev C Uncontrolled Copy
Standby Mode
When the UPS is turned off and r emains plugged into a power outlet, the
UPS is in Standby mode. All indicators are off and power is not available
to your equipment. The battery recharges when necessary.
NOTE For 220–240V models, the output receptacles may remain
electrically live (up to 110–120V). Unplug the UPS to ensure power is not
available to the output receptacles.
UPS Front Panel
The UPS front panel indicates the UPS status and also identifies potential
power problems. Figure 17 shows the UPS front panel indicators and
controls.
On/Off Button
Test/Alarm Reset Button
Power On Indicator (Green)
On Battery Indicator (Yellow)
Overload Indicator (Red)
Service Indicator (Red)
Figure 17. UPS Front Panel
If the alarm beeps or a UPS alarm indicator stays on, see Table 9 on
page 44 to identify and correct the p roblem.
Initiating the Self-Test
NOTE The batteries must be fully charged and the UPS must not be in
Battery mode to perform the self-test.
Press and hold the button for three seconds to initiate the self-test. If
the UPS finds a problem, an LED indicates where the problem is. For
more information, see “Troubleshooting” on page 43.
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