Code Name Causes Possible Solutions EP24v External Power 24V Supply The voltage of the main circuit power supply decreased, and the 24 V power supply is supplying power to the drive. Examine the main circuit power supply. Turn ON the main circuit power supply to run the drive. Note: Set o2-26 [Ext. Power 24V Supply Display] to enable or disable EP24v detection. The drive will not output an alarm signal for this alarm.