Delta VP3000 Series - Page 501

Chapter 8 Troubleshooting｜VP3000
492
ID No.
Fault Name
Descriptions
2
Over-current during
deceleration
(ocd)
Output current exceeds 1.9 times of rated current during deceleration. When
ocd occurs, the drive closes the gate of the output immediately, the motor runs
freely, and the display shows an ocd error.
Action and Reset
Action Condition
190% of the rated current
Action Time
Immediately act
Fault Treatment Parameter
No
Reset Method
Manual reset
Reset Condition
Reset in 5 sec. after the fault is cleared
Record
Yes
Cause
Corrective Actions
Deceleration time is too short
1. Increase the deceleration time
2. Increase the deceleration time of S-curve (Pr. C2-08–C2-11)
3. Adjust the accel/decel time (Pr.C2-00–C2-07)
4. Set over-current stall prevention function (Pr. H2-05–H2-07)
5. Replace the drive with a larger capacity model
Check if the mechanical brake of
the motor activates too early
Check the action timing of the mechanical brake.
Short circuit at motor output due to
poor insulation wiring
Check the motor cable and remove causes of the short circuits or replace the
cable before turning on the power.
Check for possible burnout or
aging insulation of the motor
Check the motor insulation value with megger. Replace the motor if the insulation
is poor.
The load is too large
Check if the output current during the whole working process exceeds the AC
motor drive’s rated current. If yes, replace the AC motor drive with a larger
capacity model.
Impulsive change of the load
Reduce the load or increase the capacity of AC motor drive.
Use special motor or motor with
larger capacity than the drive
Check the motor capacity (the rated current on the motor’s nameplate should ≤
the rated current of the drive)
Use ON/OFF controller of an
electromagnetic contactor at the
output (U/V/W) of the drive
Check the action timing of the contactor and make sure it is not turned ON /
OFF when the drive outputs the voltage.
V/F curve setting error
Adjust V/F curve setting and frequency/voltage. When the fault occurs, and the
frequency voltage is too high, reduce the voltage.
Torque compensation is too large
Adjust the torque compensation (refer to Pr. E0-16 torque compensation gain)
until the current reduces and the motor does not stall.
Malfunction caused by
interference
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
The length of motor cable is too
long
Enlarge the AC motor drive’s capacity.
Install AC reactor(s) on the output side (U/V/W).