Chapter 14 Fault Codes and DescriptionsC2000 Plus
ID* Display on LCD Keypad Fault Name Fault Descriptions
1
Over-current during
acceleration
(ocA)
Output current exceeds 2.4 times of rated current
during acceleration.
When ocA occurs, the drive closes the gate of the
output immediately, the motor runs freely, and the
display shows an ocA fault.
Action and Reset
Action condition 240% of rated current
Action time Act immediately
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset in 5 sec. after the fault is cleared
Record Yes
Cause Corrective Actions
Acceleration time is too short
1. Increase the acceleration time
2. Increase the acceleration time of S curve
3. Set auto-acceleration and auto-deceleration parameter (Pr.01-44)
4. Set over-current stall prevention function (Pr.06-03)
5. Replace the drive with a larger capacity model.
Short circuit at motor output due to
poor insulation wiring
Check the motor cable and remove causes of the short circuits,
cable before turning on the power.
Check for possible burnout or
aging insulation of the motor
Check the motor insulation value with megger. Replace th
e motor if the insulation
is poor.
The load is too large.
Check if the output current during the whole working process exceeds the
motor drive’s rated current. If yes, replace the AC motor drive
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 /
when the drive outputs the voltage.
V/F curve setting fault
Adjust V/F curve setting and frequency/voltage. When
the fault occurs, and the
frequency voltage is too high, reduce the voltage.
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