Troubleshooting and Maintenance
Power Module Replacement Instructions
If the power module fails, you should replace it immediately. In the Redundant mode of operation, you can replace a failed power module without disrupting service to the carrier. In the Independent mode of operation, you will only disrupt service to
CAUTION
In any mode of operation (Basic, Independent, or Redundant), you must have either one power module and cover plate, or two power modules in the CO Power Unit at all times. Do not remove a defective power module until a replacement is available. Leaving half of the CO Power Unit exposed is a safety hazard.
To replace a power module (refer to Figure
NOTE
The power module replacement procedure contained in this section must be performed by a qualified service person.
"Procedure
1.Make sure the new power module is configured with the same option settings as the failed power module. To set the option straps, see the Setting the Option Straps section in Chapter 2.
2.If an SDCP is not associated with this carrier and the power modules' faceplates are visible, loosen the two captive screws on the front of the failed power module. Remove the failed power module from the CO power tray by holding onto the power module handle and sliding the power module out.
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Figure 3-2. Replacing a Power Module
May 1998 |
