1) The name of the alarm is not UA but “ALARM 1”. UA is its type. 2) This alarm is not generated if the value of Rectifier Voltage goes up or down a specific value. This is a fake alarm and generated due to mainly conflict in 4 parameters of the Delta Rectifier Settings. 3) Find below these parameters to be checked: a. Parameter No.23: It value should be “1 SMART” …… Sometimes it is at “1 STRING” b. Parameter No.30: Its value should be “AVAILABLE” ….. Sometimes it is at “N/A”. c. Parameter No.31: Its value should be “Not Used” Sometimes it is at “UA/AUX-UA” d. Parameter No.13: Its value should be “Available” Note: Most of the time the problem is due to only No.31 because it’s related to RELAY SETTINGS and if this relay is not used and you configure it at “UA/AUX-UA”. Then it will start generating fake alarm.