Identifying Smu Faults; Parts Replacement; Replacing A Rectifier - Huawei Telecom Power TP48120A-HD15A1 User Manual

TP48120A-HD15A1, TP48120A-HD15A2,
TP48200A-HD15A1, and TP48200A-HD15A2 Telecom
Power
User Manual
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4.3.4 Identifying SMU Faults

The following are the main symptoms of SMU faults:
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4.4 Parts Replacement

 Do not maintain devices on raining days, preventing water from entering and damaging
devices.
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Disconnect the FAN-POWER cable and then the fan cable.
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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
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Issue 03 (2020-01-04)
When the rectifier does not communicate with the SMU and the AC input voltage is
around 220 V, the green indicator on the rectifier is steady on, the yellow indicator is
blinking, the red indicator is off, and the rectifier output is normal.
The SMU can perform equalized charging, float charging, and current limiting control
for the rectifier when the communication cable to the rectifier is correctly connected and
communication is established between the rectifier and the SMU.
The DC output is normal while the green indicator on the SMU is off.
The SMU breaks down or cannot be started. Its LCD has abnormal display or buttons
cannot be operated.
With the alarm reporting enabled, the SMU does not report alarms when the power
system is faulty.
The SMU reports an alarm while the power system does not experience the fault.
The SMU fails to communicate with the connected lower-level devices while the
communications cables are correctly connected.
Communication between the SMU and all rectifiers fails while both 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.
You have obtained a pair of protective gloves and the cabinet door key.
The new rectifier is intact.
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