Delta ME300 Series - Page 398

Chapter 14 Fault Codes and Descriptions
ME300
14-3
Improper parameter settings for
the speed tracking function
(including restart after momentary
power loss and restart after fault)
Correct the parameter settings for speed tracking.
1. Start the speed tracking function.
2. Adjust the maximum current for Pr.07-09 speed tracking.
Incorrect combination of control
mode and used motor
Check the settings for Pr.00-11 control mode:
1. For IM motor, Pr.00-11 = 0, 2, Pr.05-33 = 0
2. For PM motor, Pr.00-11 = 2, Pr.05-33 = 1, 2
The length of motor cable is too
long.
Increase the AC motor drive’s capacity.
Install AC reactor(s) on the output side (U/V/W).
Hardware failure
The ocA 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;
corresponds to U,
V, W.
If short circuits occur, return to the factory for repair.
Check if the setting for stall
prevention is correct.
Set the stall prevention to the proper value.
No. Display on LED Keypad Fault Name Fault Descriptions
2
Over-current during
deceleration
(ocd)
Output current exceeds 2.5 times of the 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 250% of the rated current
Action time Immediately act
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
Deceleration time is too short.
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 if the mechanical brake of
the motor activates too early
Check the action timing of the mechanical brake
Short-circuit at motor outp
ut due to
poor insulation wiring.
Without considering the short circuits, check the motor cable 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.