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Operation
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Alarm Messages
The alarm message area displays vital information about the operation of the UPS system. During
normal operation no alarm messages should be present. Alarm conditions can be monitored. The
alarm messages are displayed in reverse video (highlighted— light on dark). To clear a latching
alarm, you must also press the Alarm Reset pad after the alarm condition is corrected.
The following list shows the alarm messages that may be displayed in this area. For more information
and the corrective actions for these messages, refer to Table 9 in this section.
Item 5 - Alarm Messages
Figures 16 through 20 illustrate how the Monitor/Mimic Display screens on the SCC and on a mod-
ule depict the power flow through the UPS system.
A three-module system designed for redundant operation is shown. A multi-module UPS system may
include up to six (6) modules for each System Control Cabinet (SCC).
Input Fail Reverse Power
DC Ground Fault Rectifier Fuse Blown
DC Capacitor Fuse Blown Inverter Fault
Battery CB Open Hardware Shutdown
Battery Discharging Emergency Off
Low Battery Warning Ambient Overtemperature
Low Battery Shutdown Fan/Blower Failed
DC Overvoltage Shutdown Equipment Overtemperature
Input Current Unbalanced Overtemperature Timeout
Control Power Fail Battery Cycle Buffer Warning
Inverter Non-Synchronized Battery Overtemperature
Overload Battery Exercise
Overload Shutdown