DZB100 Series
Troubleshooting and Fault information
Chapter 7 Troubleshooting and Fault information
The AC drive has a comprehensive fault diagnosis system. Once a fault is detected, the
corresponding protective functions will be activated to turn off the AC drive output.
During any failure, the AC drive switches off and an error message will appear in the display.
The three most recent faults are stored in the AC drive non-volatile memory and may be read
through the digital keypad, or through the RS-485 interface on the control board.
Note: Pressing the Reset button will not restore the AC drive to its normal operating conditions
unless the fault is corrected.
Fault
Name
E001
E004
E005
E006
Fault Descriptions
Corrective Actions
The AC drive detects that the
DC bus voltage has fallen
below its minimum value.
Check whether the input voltage falls within the
rated AC drive's input voltage.
Over-current during
acceleration:
1. Short-circuit at motor
output.
2. Torque boost too high.
3. Acceleration time too short.
4. AC drive output capacity
too small.
Check for possible poor insulation at the output
line.
Decrease the torque boost setting in F1-54.
Increase the acceleration time.
Replace with an AC drive with higher output
capacity.
Over-current during steady
state operation:
1. Short-circuit at motor
output.
2. Sudden increase in motor
loading.
3. AC drive output capacity
too small.
Check for possible poor insulation at the output
line.
Check for possible motor stall.
Replace with an AC drive with higher output
capacity.
Over-current during
deceleration:
1. Short-circuit at motor
output.
2. Deceleration time too
short.
3. AC drive output capacity
too small.
Check for possible poor insulation at the output
line.
Increase the deceleration time.
Replace with an AC drive with higher output
capacity.
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