Delta C2000 Plus Series User Manual

Chapter 14 Fault Codes and DescriptionsC2000 Plus
14-11
ID* Display on LCD Keypad Fault Name Fault Descriptions
7
Over-voltage during
acceleration
(ovA)
DC bus over-voltage during acceleration.
When ovA occurs, the drive closes the gate of the
output, the motor runs freely, and the display shows an
ovA fault.
Action and Reset
Action condition
230V models: 410 V
DC
460V models: 820 V
DC
575V models: 1116 V
DC
690V models: 1318 V
DC
Action time Act immediately when DC bus voltage is higher than the condition
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset only when DC bus voltage is lower than 90% of the over-voltage condition
Record Yes
Cause Corrective Actions
Acceleration is too slow (e.g. hen
lifting load decreases acceleration
time)
Decrease the acceleration time
Use brake unit or DC bus
Replace the drive with a larger capacity model.
The setting for stall prevention
condition is smaller than no-load
current
The setting for stall prevention condition 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 s
hort time. In this case,
install an AC reactor.
Regenerative voltage of motor
inertia
Use over-voltage stall prevention function (Pr.06-01)
Use auto-acceleration and auto-deceleration setting (Pr.01-44)
Use a brake unit or DC bus
Acceleration time is too short
Check if the over-voltage warning occurs after acceleration stops.
When the warning occurs, do the following:
1. Increase the acceleration time
2. Set Pr.06-01 over-voltage stall prevention
3. Increase setting value for Pr.01-25 S-curve acceleration arrival time 2
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 brake resistor and brake unit.
Malfunction caused by
interference
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.

Delta C2000 Plus Series Specifications

General

Brand	Delta
Model	C2000 Plus Series
Category	DC Drives
Language	English