Table 6.3 – List of Fault Codes (Continued)

 

Fault

 

 

Code

Description

Fault Cause

Corrective Action

SrL

Communication

Serial port communication cable, PC

Check connection cable and

 

loss between

or OIM communication port setup.

communication port setup.

 

Regulator/PC/OIM

 

 

UAr

Spurious host PC

Regulator board failure.

Replace Regulator board.

 

comm interrupt

 

 

UbS

Asymmetrical bus

One of 3 differnet faults has occurred;

 

 

fault. Look at the 3

1. Input Ground Fault - Excessive

1. Check the connection from the

 

LEDs on the Power

current flowing bwtween any of the

current transformer to the Bus Control

 

Module Interface

three input phases and earth ground.

board.

 

board. They

2 . Asymmetrical Bus - When

2. Replace shorted capacitor, fix loose

 

indicate which fault

measuring between the cap bank

connection, or replace discharge

 

has occurred by

midpoint and the +DC bus and -DC

resistor.

 

flashing in unison.

bus, there is a 200 V or greater

 

 

 

mismatch.

 

 

1 = Input Ground

3. Slow Ramp Rate of DC Bus - DC

3. Turn on drive. If UbS is displayed,

 

Fault;

bus did not change to the ful value

turn drive off and then on again very

 

2 = Asymmetrical

given time allowed. Can occur only at

quickly. If the UbS fault goes away and

 

Bus;

power-up.

the DC bus charges, replace the Bus

 

3 = Slow Ramp

 

Control board.

 

Rate of DC Bus

 

 

6.4.3 Accessing, Reading, and Clearing the Faults in the Error Log

The following procedure shows how to access and clear the error log. Note that you cannot clear a single entry from the error log. The entire log, including all the fault codes and the day and time stamp of each fault, will be cleared simultaneously using this procedure.

Step 1. Press the PROGRAM key.

The First Menu General parameters are displayed. The PROGRAM LED will turn on.

Troubleshooting the Drive

6-11

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Image 29
Carrier D2-3466-2 instruction manual Input Ground Fault Excessive, Asymmetrical Bus When, Slow Ramp Rate of DC Bus DC