APAA00001
User Manual
4 System Maintenance
Draft A (2015-06-12)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
18
Table 4-2
AISG/OOK overcurrent alarm
Symptom
Impact on the
System
Severity
Cause
If the ALD connected to the
AISG or OOK port on the
PAA has overly strong
current or is short-circuited,
the AISG/OOK overcurrent
alarm is reported. In this
situation, the PAA forcibly
shuts down the external
power supply and the alarm
indicator is steady on. This
alarm can be queried using
the PAA app.
The ALD cannot
be connected or
controlled for
software
uploading,
device
information
query, or other
purposes.
Major
The instantaneous
current is overly
strong during hot
swapping.
The number of ALDs
connected to the PAA
is too large, or the
operating current of
the ALD is
excessively strong.
The ALD is short
circuited.
The ALD experiences
a hardware fault.
The PAA is faulty.
Procedure
Step 1
Tap the external power supply switch on the PAA app to turn on the external power supply
from the PAA again.
No further actions are required if the external power supply is successfully turned on, the
PAA communicates successfully with the ALD, and the alarm is cleared.
After the power supply switch is turned on, the PAA forcibly shuts down the external
power supply. If the alarm still persists, go to Step 2
Step 2
Check whether the communication link or each PAA is short-circuited.
If a short circuit occurs, rectify the fault and then turn on the external power supply from
the PAA again. If the alarm is cleared, no further actions are required. If the alarm
persists, go to Step 3.
If no short circuit occurs, go to Step 3
Step 3
Check whether the total working current of all the ALDs connected to the PAA exceeds 1 A.
If the total current is not greater than 1 A, go to Step 4.
If the total current is greater than 1 A, decrease the number of ALDs so that the total
current is equal to or less than 1 A, and then turn on the external power supply from the
PAA. If the alarm is cleared, no further actions are required. If the alarm persists, go to
Step 4.
Step 4
Replace the faulty ALD and then turn on the external power supply from the PAA again.
If the alarm is cleared, no further actions are required.
If the alarm persists, replace the PAA. If the alarm is cleared after the replacement, no
further actions are required. If the alarm persists, contact Huawei technical support.
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