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45
Troubleshooting
Alarm and Fault Messaging
The UPS displays a combination of LED and LCD messaging to alert you of potential
UPS, Utility, and Battery mode issues.
Fault LED Conditions LCD Fault Displays
DC Bus Voltage > 300VDC
Bus Voltage
Over
When unit starts, internal DC Bus
voltage is < target voltage for
15sec+.
Bus Soft Fail
Battery mode inverter output
voltage is greater than 150VAC
INV Opv High
Battery mode inverter output
voltage is less than 96VAC
INV Opv Low
Internal UPS temperature is
greater than 120C (248F)
Over Temp
Output Short Circuit Output short
Battery voltage higher than 60V
for SMART1548ET and higher
than 30V for SMART1524ET in
Battery Mode
Bat High
Output Overload Over Load
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