- General Electric Computer Accessories User Manual

GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 4 Wizards •
••
• 4-5
Running the Fiber-Optic Test
Running the Test
Read all of the Fiber-Optic Test instructions in this section
before running the test. The user must be familiar with the
correct LED lighting sequence in order to determine if the
fiber-optics are connected properly.
Once you are familiar with the test instructions, run the test as follows.
1. De-energize the drive following the procedures outlined in the installation and
startup manual GEH-6381.
(Confirm that the switchgear, control breaker CB1 and charger switch LSW1 are
open and locked out, tagged out and checked for zero voltage. That the DC bus
is fully discharged and checked for zero voltage. That safety grounds have been
applied using proper grounding procedures.)
2. With safety grounds applied and the converter cabinet doors open, close control
breaker CB1 and run the Cell Test Wizard from the toolbox. Choose the Fiber-
Optic Test.
3. From the Fiber-Optic Test dialog box press Execute.
4. From the drive cabinet, observe the LED lighting sequence. The LEDs are
located on the IGBT gate driver boards (IGDM). If the observed LED lighting
sequence matches the correct LED lighting sequence (See Figure 1), then the
test passed.
AS1
AS2AS3
AS4 BS1
BS2BS3
BS4 CS1
CS2CS3
CS4
DBS1
DBS2
Source
Cabinet
Dynamic
Brake
Phase Leg
Assembly
A
Phase Leg
Assembly
B
Phase Leg
Assembly
C
Load
Cabinet
Figure 1. Physical Diagram of Correct LED Lighting Sequence
Figure 1 shows the dynamic brake and phase assemblies inside the drive cabinets.
The dynamic brake assembly on the left is located in the source cabinet. The phase
leg assemblies are located in the load cabinet.