Chapter 6 Fault Codes and Descriptions DD Series

6-1 Common Problems and Solutions

Following fault name will only be displayed when using the digital keypad.

 

Display

Description

 

Corrective Actions

 

 

 

 

 

 

 

Over-current during

1.

Short-circuit at motor output: Check for

 

 

acceleration

 

possible poor insulation at the output.

 

 

(Output current exceeds triple

2.

Acceleration Time too short: Increase

 

 

rated current during

 

the Acceleration Time.

 

 

acceleration.)

 

 

 

3.

AC motor drive output power is too

 

 

 

 

 

 

 

small: Replace the AC motor drive with

 

 

 

 

the next higher power model.

 

 

 

 

 

 

 

Over-current during

1.

Short-circuit at motor output: Check for

 

 

deceleration

 

possible poor insulation at the output.

 

 

(Output current exceeds triple

2.

Deceleration Time too short: Increase

 

 

rated current during

 

the Deceleration Time.

 

 

deceleration.)

 

 

 

3.

AC motor drive output power is too

 

 

 

 

 

 

 

small: Replace the AC motor drive with

 

 

 

 

the next higher power model.

 

 

 

 

 

 

 

Over-current during steady

1.

Short-circuit at motor output: Check for

 

 

state operation

 

possible poor insulation at the output.

 

 

(Output current exceeds triple

2.

Check if motor is jammed.

 

 

rated current during constant

3.

AC motor drive output power is too

 

 

speed.)

 

 

 

small: Replace the AC motor drive with

 

 

 

 

 

 

 

 

the next higher power model.

 

 

 

 

 

 

 

Short-circuit is detected

 

 

 

 

between upper bridge and

Return to the factory

 

 

lower bridge of the IGBT

 

 

 

 

module

 

 

 

 

Hardware failure in current

Return to the factory

 

 

detection Over current occur at

 

 

 

 

STOP

 

 

 

 

DC BUS over-voltage during

1.

Check if the input voltage falls within

 

 

acceleration (230V: DC 450V)

 

the rated AC motor drive input voltage

 

 

 

 

range.

 

 

DC BUS over-voltage during

 

 

 

2.

Check for possible voltage transients.

 

 

deceleration (230V: DC 405V)

 

 

 

 

 

 

 

3.

If DC BUS over-voltage due to

 

 

DC BUS over-voltage at

 

 

 

regenerative voltage, please increase the

 

 

constant speed (230V: DC

 

Deceleration Time or add an optional brake

 

 

405V)

 

 

 

 

resistor.

 

 

 

 

 

 

 

 

 

6-2

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3Com VFD-D D manual Common Problems and Solutions, Stop

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