TP48200A-HT15D3 Telecom Power (Russia, Megafon)
User Manual
4 Maintenance
Issue 03 (2019-11-15)
Copyright © Huawei Technologies Co., Ltd.
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The SMU fails to communicate with the connected lower-level devices even though the
communications cables are correctly connected.
Communication between the SMU and all rectifiers fails even though the rectifiers and
the communications cables are normal.
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.
4.4 Parts Replacement
Do not maintain devices on raining days, preventing water from entering and damaging
devices.
Disconnect the FAN-POWER cable and then the fan cable.
Ensure that you have connected the fan cable correctly according to the silk screen on the
panel before you connect the FAN-POWER cable.
4.4.1 Replacing a Rectifier
Prerequisites
Protective gloves and the cabinet door key are available.
The new rectifier is intact.
To prevent burns, exercise caution when removing a rectifier because the rectifier may be hot
as a result of continuous operation.
Procedure
Step 1
Wear protective gloves.
Step 2
Push the locking latch on the right side of the panel towards the left.
Step 3
Gently draw the handle outwards, and then remove the rectifier from the subrack, as shown in
Figure 4-1.