Xtreme Power Conversion Corporation
M90 User’s Manual
Page 62
Uninterruptible Power Supply
Figure 4-29 Reset All Events Confirmation screen
4.3 Alarm List
In Table 4-12, it provides the complete list of UPS alarm messages.
Table 4-12
: Alarm List
Representation in display LCD
Explanation
Fault! Bus Over Voltage
DC bus voltage is too high
Fault! Bus Under Voltage
DC bus voltage is too low
Fault! Bus Voltage Unbalance
DC bus voltage is not balanced
Fault! Bus Short
DC bus is short
Fault! Bus Soft Start Time Out
The rectifiers can’t start due to low DC bus voltage within specified
duration
Fault! Inverter Soft Start Time Out
Inverter bus voltage cannot reach desired voltage within specified dura
-
tion
Fault! Inverter Voltage Over
Inverter Voltage is over Peak Value.
Fault! Inverter Voltage High
Inverter Voltage is too high
Fault! Inverter Voltage Low
Inverter Voltage is too Low
Fault! R Inverter Voltage Short
R phase inverter Output is short-circuited.
Fault! S Inverter Voltage Short
S phase inverter Output is short-circuited.
Fault! T Inverter Voltage Short
T phase inverter Output is short-circuited.
Fault! RS Inverter Voltage Short
R-S inverter Output is short-circuited.
Fault! ST Inverter Voltage Short
S-T inverter Output is short-circuited.
Fault! TR Inverter Voltage Short
T-R inverter Output is short-circuited.
Fault! Inverter R Negative Power
R phase inverter Output Negative Power over range
Fault! Inverter S Negative Power
S phase inverter Output Negative Power over range
Fault! Inverter T Negative Power
T phase inverter Output Negative Power over range
Fault! Over Load Fault
Heavy overload causes UPS fault.
Fault! Battery Fault
Batteries reversed
