Delta MS300 Series User Manual page 564

ID Display on LCD Keypad
8
Action Condition
Action Time
Fault Treatment Parameter
Reset Method
Reset Condition
Record
Cause
Deceleration time is too short,
causing too large regenerative
energy of the load
The setting for stall prevention
level is smaller than no-load
current
Power voltage is too high
ON/OFF switch action of phase-in
capacitor in the same power
system
Motor ground fault
Incorrect wiring of brake resistor or
brake unit
Malfunction caused by
interference
Fault Name
Over-voltage during
deceleration
(ovd)
Action and Reset
230V models: 410 V
DC
460V models: 820 V
DC
575V models: 1116 V
DC
Immediately act when the DC bus voltage is higher than the level
N/A
Manual reset
Reset only when the DC bus voltage is lower than 90% of the over-voltage level
Yes
1. Increase the setting value of Pr.01-13, Pr.01-15, Pr.01-17 and Pr.01-19
(deceleration time)
2. Connect the brake resistor, braking unit or DC bus on the drive.
3. Reduce the brake frequency.
4. Replace the drive with a larger capacity model.
5. Use S-curve acceleration/deceleration.
6. Use over-voltage stall prevention (Pr.06-01).
7. Use auto-acceleration and auto-deceleration (Pr.01-44).
8. Adjust the braking level (Pr.07-01 or the bolt position of the brake unit).
The setting for the stall prevention level should be larger than no-load current
Check if the input voltage is within the rated AC motor drive input voltage range,
and check for possible voltage spikes.
If the phase-in capacitor or active power supply unit acts in the same power
system, the input voltage may surge abnormally in a short time. In this case,
install an AC reactor.
The ground short circuit current charges the capacitor in the main circuit
through the power. Check if there is ground fault on the motor cable, wiring box
and its internal terminals.
Troubleshoot the ground fault.
Check the wiring of the brake resistor or braking unit.
Verify the wiring of the control circuit and the wiring/grounding of the main
circuit to prevent interference.
555
Fault Descriptions
DC bus over-voltage during deceleration.
When ovd occurs, the drive closes the gate of the
output immediately, the motor runs freely, and the
display shows an ovd error.
Corrective Actions
Chapter 14 Fault CodesMS300