Local Operation
Alarms and Errors
Several conditions can cause alarms in the XG. Some conditions are:
•From user configurable features.
•Controlled in hardware and will trigger regardless of configuration.
All alarms, with the exception of the Fan alarm, will result in the output of the power supply being disabled. The Fan alarm does not affect the output.
When an alarm is triggered, the appropriate alarm message will begin blinking on the display and the Alarm LED will be illuminated.It is possible that more than one alarm will trigger at the same time. When this occurs, the alarm with the highest precedence will blink on the display. Table
Table 3-4 Alarm Order of Precedence
Alarm | Precedence | Output | Maskable | Display |
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| Latch |
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AC Fail | 1 (Highest) | Yes | No | AC Fail |
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Over Temperature Protection (OTP) | 2 | Yes | Yes | O7P Pro |
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Fan | 4 | No | Yes | FAn Pro |
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Interlock | 6 | No | No | In Loc |
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Over Voltage Protection (OVP) | 7 | Always | No | OVP Pro |
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Over Current Protection (OCP) | 8 | Always | No | OCP pro |
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Foldback | 9 | Yes | Yes | FLD Pro |
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External Shutdown | 10 | No | Yes | SD POL |
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Under Voltage Protection (UVP) | 11 (Lowest) | No | Yes | UUP Pro |
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Flash Checksum Failure1 | N/A | N/A | N/A | FLA FAIL |
1.The Flash Checksum Failure alarms are an exception as they are a terminal alarm that can only occur during boot up. It can only be cleared by doing a soft reset (losing the configuration of the unit) or by power cycling the unit.
