Delta VFD-VJ Series Drive
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Apr 21, 2022 5:40 am
How can resolve problem Lvn DC bus voltage is lower fault in delta VJ series Drive ?
1 Reply
Apr 21, 2022 5:41 am
Cause : DC bus voltage is lower than the setting at Pr02-07 when running at constant speed.
1. Check if the voltage of input power is
normal.
2. Check if there is any sudden heavy
load.
3. Adjust the low voltage level in
Pr02-07.
4. Lvn often occurs when the motor
drive has a power failure while the
operating signals are still being sent.
