Delta MS300 Series User Manual page 396

start relay remains closed), and the drive executes auto-deceleration.
 Situation 1: Momentary power loss, or too low and unstable power voltage, or power supply
sliding down because of sudden heavy load
Pr.07-13 = 1 and power recovers
When the power recovers and DC bus voltage exceeds the dEb return level, the drive
linearly decelerates to 0 Hz and stops. The keypad displays the "dEb" warning until you
manually reset it, so you can see the reason for the stop.
 Situation 2: Momentary power loss, or too low and unstable power voltage, or power supply
sliding down because of sudden heavy load
Pr.07-13 = 2 and power recovers
During the dEb deceleration (includes 0 Hz run), if the power recovers to a voltage higher
than dEb return level, the drive maintains the frequency for three seconds and then
accelerates again. The "dEb" warning on the keypad is automatically cleared.
Chapter 12 Descriptions of Parameter SettingsMS300
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