Chapter 4 Parameters
4-132
Situation 2: Power supply unexpected shut down/power loss
Pr08-24=1 and power will not recover. The keypad will display “dEb” warning and decelerated
to 0Hz and stop. When the DCBUS voltage is lower than 150/300 Vdc level, the drive will
disconnect soft-start relay and be completely out of power
DC Bus voltage of the motor drive
dEb operation level
Lv level
Soft start relay at power side
dEb operation
MO/Display
Output Frequency
MO=10
Lv operation
Exception: If the output frequency doesn’t decrease to 0Hz yet and DC Bus voltage is lower
than 150/300Vdc, the motor drive start to free run immediately and soft start relay is
disconnected.
When this situation happens, “dEb” will be displayed on the keypad and needs to be reset
manually.
DC Bus voltage of the motor drive
dEb return level
dEb operation level
Lv level
150/300Vdc
Soft start relay at power side
dEb operation
MO/Display
Output Frequency
0 Hz
MO =10
Lv operation
Completely out of power
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