FR6822+ Frames
Installation and Operation Manual
77
Copyright © 2008-2011, Harris Corporation
Protecting
the Power
Supply
6822+AC and 6800+48V power supplies are designed to shut down in over-voltage and
over-temperature situations. In both instances, the power supply automatically returns to
normal operation when the conditions that triggered the shutdown are resolved.
The over-voltage protection (OVP) level is set at 120% ±10% of the nominal output voltage
(13.6 output only). In the case of an OVP condition, the power supply shuts down until the
condition is resolved.
If the PSU falls outside of the normal operating temperature range of 32°F (0°C) to 113°F
(45°C), it will shut down until the temperature returns to the normal range.
Alarm Signals and Indicators
If the PSU detects an over-voltage, over-current, or over-temperature condition, it sends a
fault signal to a monitoring device (such as a locally connected PC or a GUI-based software
application like Navigator).
On the FR6822+ front panel, the PSU status is communicated via two LED indicators (see
Figure 5-3). A third LED (right) is present on the front panel, but reports only the fan
assembly status.
A green Power LED (right) indicates that the power supply is operating normally with
no reported fault conditions.
A red Alarm LED (middle) indicates that a fault condition exists.
Both LEDs are located on the front panel of the FR6822+ frame.
Figure 5-3 Location of PSU Status LEDs
The Alarm LED automatically turns off once the condition that triggered it is resolved.
PSU status LEDs: Alarm/Power
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