Chapter 6 Fault Code Information

Chapter 6 Fault Code Information

The AC motor drive has a comprehensive fault diagnostic system that includes several different alarms and fault messages. Once a fault is detected, the corresponding protective functions will be activated. The following faults are displayed as shown on the AC motor drive digital keypad display. The three most recent faults can be read from the digital keypad or communication.

6.1 Common Problems and SolutionsManual backgroundManual backgroundManual backgroundNOTE

Wait 5 seconds after a fault has been cleared before performing reset via keypad of input terminal.

6.1 Common Problems and Solutions

Fault

Fault Descriptions

 

Corrective Actions

Name

 

 

 

 

 

 

1.

Check if motor power corresponds with the

 

 

 

AC motor drive output power.

 

 

2.

Check the wiring connections to U/T1, V/T2,

 

 

 

W/T3 for possible short circuits.

 

 

3.

Check the wiring connections between the AC

 

 

 

motor drive and motor for possible short

 

 

 

circuits, also to ground.

 

Over current

4.

Check for loose contacts between AC motor

 

 

drive and motor.

 

Abnormal increase in current.

 

 

5.

Increase the Acceleration Time.

 

 

 

 

6.

Check for possible excessive loading

 

 

 

conditions at the motor.

 

 

7.

If there are still any abnormal conditions when

 

 

 

operating the AC motor drive after a short-

 

 

 

circuit is removed and the other points above

 

 

 

are checked, it should be sent back to

 

 

 

manufacturer.

 

 

 

 

 

 

1.

Check if the input voltage falls within the

 

Over voltage

 

rated AC motor drive input voltage range.

 

2.

Check for possible voltage transients.

 

The DC bus voltage has

3.

DC-bus over-voltage may also be caused by

 

exceeded its maximum

 

motor regeneration. Either increase the

 

allowable value.

 

Decel. Time or add an optional brake resistor.

 

 

4.

Check whether the required brake power is

 

 

 

within the specified limits.

Revision August 2008, SE09, SW V2.61

6-1

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Delta Electronics VFD-S manual Fault Code Information, Common Problems and Solutions