Power Supply Problems

The green power LED should light on each power supply.

The red LED on the processor should turn on for 15 to 45 seconds and then turn off.

All indicators on the 100D and 400EM modules (if present) should turn on and then off. They remain off when the modules are idle.

If any of these responses do not occur or if the console operator reports any problems, continue with “Checking the Interlocking Post” below.

Checking the Interlocking Post

If the power supply is not working, follow the steps below to check the interlocking post.

1Follow Steps 1-4 in “Replacing the Power Supply,” later in this chapter, to remove the power supply, then return to Step 2 below.

2Check the small, cylindrical interlocking post on the carrier that locks into the power supply (see Figure 4-1).

If the post is broken, replace the carrier.

Control Unit Problems 4-3

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AT&T 3.0 manual Checking the Interlocking Post