Identifying Smu Faults - Huawei ETP4830-A1 User Manual

ETP4830-A1
User Manual
Symptom
The Fault indicator (red) is
steady on.

7.3.2 Identifying SMU Faults

Table 7-3 Identifying SMU faults
Symptom
The Run indicator (green) is
off.
The Run indicator (green) is
blinking fast.
The Alarm indicator (red) is
steady on.
Issue 06 (2014-02-20)
Possible Cause
interrupted.
The rectifier protects
against output overvoltage.
The rectifier has no output
due to an internal fault.
Cause
There is no input.
The SMU fails to
communicate with the host.
A major or critical alarm is
generated.
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7 Maintenance
Measures
blinking, check the SMU and
the AC/DC power distribution
subrack.

If a single rectifier is
locked, remove the
rectifier whose indicator is
steady red, and then power
on the rectifier after the
indicator turns off. If the
overvoltage still occurs,
replace the rectifier.
 If multiple rectifiers are
locked, remove all
rectifiers and reinstall
them one by one to locate
the faulty rectifiers. Then
replace faulty rectifiers.
Replace the faulty rectifier.
Measures

Check whether the green
indicators on rectifiers
are steady on. If yes, the
input to the
ETP48150-A3 is normal.

Reseat the SMU. If the
fault persists, replace the
SMU.
Check whether the
communication between the
SMU and the host is normal.
Query the current alarm on
the host or SMU LCD to
identify the fault.
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