Delta VFD4A2ME43ANNAA User Manual

Chapter 14 Fault Codes and DescriptionsME300
14-3
Cause Corrective Actions
Short-circuit at motor output 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 shaft lock,
burnout or aging insulation of the
motor
Troubleshoot the motor shaft lock.
Check the motor insulation value with megger. Replace the motor if the
insulation is poor.
Impulsive change of the load Reduce the load or increase the capacity of the 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 settings 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.07-26 torque compensation gain)
until the output 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.
Increase the AC motor drive’s capacity.
Install AC reactor(s) on the output side (U/V/W).
Hardware failure
The ocn 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.
ID No. Display on LCM Keypad Fault Name Fault Descriptions
4
Ground fault
(GFF)
When (one of) the output terminal(s) is grounded, short
circuit current is larger than Pr.06-60 setting value, and
the detection time is longer than Pr.06-61 time setting,
GFF occurs.
NOTE: the short circuit protection is provided for AC
motor drive protection, not to protect you.
Action and Reset
Action level Pr.06-60 (Default = 60%)
Action time Pr.06-61 (Default = 0.10 sec.)
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
Motor burnout or aging insulation
occurred.
Check the motor insulation value with megger. Replace the motor if the
insulation is poor.
Short circuit due to broken cable
Troubleshoot the short circuit.
Replace the cable.
Larger stray capacitance in the
cable and terminal
If the motor cable length exceeds 100 m, decrease the setting value for carrier
frequency.
Take remedies to reduce stray capacitance.
Malfunction caused by interference
Verify the grounding and wiring of the communication circuit. It is recommended
to separate the communication circuit from the main circuit, or wire in 90 degree
for effective sufficient anti-interference performance.
Hardware failure
Cycle the power after checking the status of motor, cable and cable length. If
GFF still exists, return to the factory for repair.
ID No. Display on LCM Keypad Fault Name Fault Descriptions
6
Over-current at stop
(ocS)
Over-current or hardware failure in current detection at
stop. Cycle the power after ocS occurs. If the hardware
failure occurs, the display shows cd1, cd2 or cd3.
Action and Reset
Action level 240% of the rated current
Action time Immediately act
Fault treatment parameter N/A

Delta VFD4A2ME43ANNAA Specifications

General

Brand	Delta
Model	VFD4A2ME43ANNAA
Category	DC Drives
Language	English