Huawei MTS9300A - 4.3 Replacing Components; 4.3.1 Replacing an SMU02 C

● The SMU cannot monitor AC or DC power distribution when communications
cables are intact and AC and DC power distribution is normal.
● Parameters cannot be set or running information cannot be viewed on the
SMU.
4.3 Replacing Components
NO TICE
● Ensure that loads are supplied with power when replacing major components.
For example, keep the switches for primary loads in the ON position, and do
not turn
o the battery switch and AC input switch at the same time.
● Seek the customer's prior consent if load disconnection is required.
●
Rectiers and the SMU are hot-swappable.
4.3.1 Replacing an SMU02C
Prerequisites
● You have obtained the cabinet door key.
● The new SMU02C is intact.
Procedure
Step 1 Connect the ground cable for the ESD wrist strap, and put on the ESD wrist strap
and ESD gloves.
NO TE
Record the software version of the old SMU. If the old SMU is damaged and cannot be
viewed, send the barcodes of the old SMU and the cabinet to Huawei service personnel for
query.
Step 2 Remove the communications cable from the SMU02C panel and record the cable
information..
Step 3 Push the locking latch leftwards.
Step 4 Pull the handle outwards and remove the SMU02C, as shown in Figure 4-1.
Figure 4-1 Removing the SMU02C
MTS9300A Telecom Power (Ooredoo, Indonesia,
MTS9304A-HD2002)
User Manual 4 Maintenance
Issue 06 (2021-10-13) Copyright © Huawei Technologies Co., Ltd. 50