TP48200A-D17B3
Troubleshooting Guide
6 Replacing Main Components
Issue 03 (2013-05-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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6
Replacing Main Components
This chapter describes how to replace the main components of the power system.
Load disconnection is prohibited when you replace the main components. Take measures to ensure
that important loads are always connected during the replacement. For example, keep the circuit
breaker of important loads set to ON and storage batteries and AC input are not cut off.
If a load must be disconnected, ask for the customer's prior permission.
The PSU and the PMU are hot-swappable.
For more safety precautions, see Safety Information.
6.1 Replacing the PSU
To replace the PSU, perform the following steps:
Step 1
Loosen the screws on the PSU panel using a flat-head screwdriver.
Step 2
Pull the handle of the PSU outwards, and then remove the PSU from the plug-in subrack, as
shown in Figure 6-1.
Step 3
Insert the PSU into the corresponding slot in the plug-in subrack. Then, loosen the screws on
the handle and pull out the handle.
Step 4
Slide the PSU into the plug-in subrack slowly along the guide rails. Then, lock the handle.
Step 5
Tighten the screws on the handle, as shown in Figure 6-2.
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Figure 6-1
Removing the old PSU
