Line Interactive UPS User Manual
Basic Operation and Feature Set
35
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Warning Message Shown on LCD
Reason for Message
Low Internal Temperature
Your UPS has detected a low internal temperature, will shut down, and will
not allow a manual restart until an acceptable temperature range is
reached.
Understanding Fault Log Messages
The following are all the possible faults and corresponding messages that may or may not appear as one of the three
most current when scrolling through the event logs in the LCD screen.
Fault Message Shown on LCD
Reason for Message
Output Short Circuit
A battery mode short has occurred. Disconnect all equipment connected to
your UPS.
If the message still appears after disconnecting all connected equipment,
av.middleatlantic.techsupport@legrand.com
3901.
Internal Bus Fault
An internal bus fault occurred in your UPS.
av.middleatlantic.techsupport@legrand.com
3901.
Inverter / Output Failure
An inverter fault occurred in your UPS. The UPS still operates in Line mode,
but if it goes into Battery mode it will shut down.
av.middleatlantic.techsupport@legrand.com
3901.
Charger Failure
A charger fault occurred in your UPS. The UPS will still operate; however, the
battery is no longer being charged.
av.middleatlantic.techsupport@legrand.com
3901.
Bad Battery – PLS replace
battery
Your UPS battery requires replacement.
av.middleatlantic.techsupport@legrand.com
3901.