Chapter 14 Fault Codes And Descriptions - Delta VFD300C43S-HS User Manual

Chapter 14 Fault Codes and Descriptions

* : Refer to setting of Pr. 06-17–Pr. 06-22.
ID* Display on LCM Keypad
1
Action level
Action time
Fault treatment parameter
Reset method
Reset condition
Record
Cause
Acceleration time is too short
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 motor starts when in free run Enable the speed tracking during start-up of Pr. 07-12.
Improper parameter settings for
the speed tracking function
(including restart after momentary
power loss and restart after fault)
Incorrect combination of control
mode and used motor
The length of motor cable is too
long
Fault Name
Output current exceeds 2.4 times of rated current during
Over-current during acceleration.
acceleration When ocA occurs, the drive closes the gate of the
(ocA) output immediately, the motor runs freely, and the
display shows an ocA 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 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.
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 setting 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.
Correct the parameter settings for speed tracking.
1. Start the speed tracking function.
2. Adjust the maximum current for Pr. 07-09 speed tracking.
Check the settings for Pr. 00-11 control mode:
1. For IM, Pr. 00-11=0, 1, 2, 3, 5
2. For PM, Pr. 00-11=4, 6, or 7
Increase AC motor drive's capacity.
Install AC reactor(s) on the output side (U/V/W).
14-1
Chapter 14 Fault Codes and DescriptionsC2000-HS
Fault Descriptions
Corrective Actions