Delta VFD1A5MS43ANSAA User Manual

Chapter 14 Fault CodesMS300
555
ID
Display on LCD Keypad
Fault Name
Fault Descriptions
8
Over-voltage during
deceleration
(ovd)
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.
Action and Reset
Action Condition
230V models: 410 V
DC
460V models: 820 V
DC
575V models: 1116 V
DC
Action Time
Immediately act when the DC bus voltage is higher than the level
Fault Treatment Parameter
N/A
Reset Method
Manual reset
Reset Condition
Reset only when the DC bus voltage is lower than 90% of the over-voltage level
Record
Yes
Cause
Corrective Actions
Deceleration time is too short,
causing too large regenerative
energy of the load
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 stall prevention
level is smaller than no-load
current
The setting for the stall prevention level should be larger than no-load current
Power voltage is too high
Check if the input voltage is within the rated AC motor drive input voltage range,
and check for possible voltage spikes.
ON/OFF switch action of phase-in
capacitor in the same power
system
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.
Motor ground fault
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.
Incorrect wiring of brake resistor or
brake unit
Check the wiring of the brake resistor or braking unit.
Malfunction caused by
interference
Verify the wiring of the control circuit and the wiring/grounding of the main
circuit to prevent interference.

Delta VFD1A5MS43ANSAA Specifications

General

Brand	Delta
Model	VFD1A5MS43ANSAA
Category	DC Drives
Language	English