Delta VFD300C43S-HS User Manual page 557

ID* Display on LCM Keypad
2
Action level
Action time
Fault treatment parameter
Reset method
Reset condition
Record
Cause
Deceleration time too short
Check if the mechanical brake of
the motor activates too early
Short-circuit at motor output due to
poor insulation wiring
Check for possible burnout or
aging insulation of the motor
The load is too large
Impulsive change of the load
Use special motor or motor with
larger capacity than the drive
Use ON/OFF controller of an
electromagnetic contactor at the
output (U/V/W) of the drive
V/F curve setting error
Torque compensation is too large
Malfunction caused by interference
The length of motor cable is too
long
Hardware error
Check if the setting of stall
prevention is correct
Fault Name
Output current exceeds 2.4 times of rated current during
Over-current during deceleration.
deceleration When ocd occurs, the drive closes the gate of the
(ocd) output immediately, the motor runs freely, and the
display shows an ocd error.
Action and Reset
240% of rated current
Immediately act
N/A
Manual reset
Reset in 5 sec. after the fault is cleared
Yes
1. Increase the deceleration time
2. Increase the deceleration 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
Check the action timing of the mechanical brake
Check the motor cable and remove causes of the short circuits, or replace the
cable before turning on the power.
Check the motor insulation value with megger. Replace the motor if the
insulation is poor.
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.
Reduce the load or increase the capacity of AC motor drive.
Check the motor capacity (the rated current on the motor's nameplate should ≦
the rated current 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.
Adjust V/F curve settings and frequency/voltage. When the fault occurs, and the
frequency voltage is too high, reduce the voltage.
Adjust the torque compensation (refer to Pr.07-26 torque compensation gain)
until the output current reduces and the motor does not stall.
Verify the wiring of the control circuit and wiring/grounding of the main circuit to
prevent interference.
Increase AC motor drive's capacity
Install AC reactor(s) on the output side (U/V/W)
The ocd occurs due to short circuit or ground fault at the output side of the drive.
Check for possible short circuits between terminals with the electric meter:
B1 corresponds to U, V, W; DC- corresponds to U, V, W;
V, W.
If short circuits occur, return to the factory for repair.
Set the stall prevention to the proper value.
14-3
Chapter 14 Fault Codes and DescriptionsC2000-HS
Fault Descriptions
Corrective Actions
corresponds to U,