The reason for the occurrence of the last transfer to UPS battery power. The variable is set to noTransfer(1) if there is no transfer yet. The variable is set to highLineVoltage(2) if the transfer to battery is caused by an over voltage greater than the high transfer voltage. The variable is set to brownout(3) if the duration of the outage is greater than five seconds and the line voltage is between 40 percent of the rated output voltage and the low transfer voltage. The variable is set to blackout(4) if the duration of the outage is greater than five seconds and the line voltage is between 40 percent of the rated output voltage and ground. The variable is set to smallMomentarySag(5) if the duration of the outage is less than five seconds and the line voltage is between 40 percent of the rated output voltage and the low transfer voltage. The variable is set to deepMomentarySag(6) if the duration of the outage is less than five seconds and the line voltage is between 40 percent of the rated output voltage and ground.