Identifying Smu Faults - Huawei ETP4830-A1 User Manual

ETP4830-A1 Embedded Power
User Manual
Symptom
The Alarm indicator
(yellow) is blinking.
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.
Issue 10 (2017-08-08)
Possible Cause
Communication between
the rectifier and the SMU is
interrupted.
The rectifier is protecting
itself against output
overvoltage.
The rectifier has no output
due to an internal fault.
Cause
There is no input.
The SMU has failed to
communicate with the host.
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7 Maintenance
Corrective Measures
the fault.
 If the fault persists, the
rectifier may be faulty.
Replace the faulty
rectifier.
Clean the edge connector of
the faulty rectifier. If the
Alarm indicator is still
blinking, check the SMU and
the AC/DC power distribution
subrack.
 If a single rectifier is
locked, remove the
rectifier that is indicating
the fault, and then power
on the rectifier after the
indicator turns off. If
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.
Replace the faulty
rectifiers.
Replace the faulty rectifier.
Corrective Measures
 Check whether the green
indicators on rectifiers
are steady on. If so, the
input to the power
subrack is normal.
 Reseat the SMU. If the
fault persists, replace the
SMU.
Check whether
communication between the
SMU and the host is normal.
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