Alarm ID
Alarm Name
Alarm
Severity
Possible Cause
Solution
A280-02
Power frequency
abnormal
Major
The power supply
frequency exceeds the
upper threshold.
Check the power
supply frequency, and
ensure that it is within
the working range.
A281-01
Power voltage
abnormal
Major
● The power supply
voltage is below
the lower
threshold.
● If a voltage jumper
is used, it may be
incorrectly
connected.
● If a toggle switch is
used, it may be
incorrectly set.
1. Check that the
power supply
voltage is within
the operating
range.
2. Maintain or replace
the voltage jumper.
3. Set the toggle
switch correctly.
A281-02
Power voltage
abnormal
Major
● The power supply
voltage exceeds the
upper threshold.
● If a voltage jumper
is used, it may be
incorrectly
connected.
● If a toggle switch is
used, it may be
incorrectly set.
1. Check the power
supply voltage.
2. Maintain or replace
the voltage jumper.
3. Set the toggle
switch correctly.
A30C-01
A30C-02
A30C-04
Certificate is about to
expire
Warning
● The corresponding
certificate is about
to expire.
● The system time is
incorrectly set.
1. Apply for a new
certificate promptly
and update the
existing one.
2. Calibrate the
system time.
A30D-01
Certificate is not in
effect
Warning
● The installed
certificate does not
take effect.
● The connection of
the corresponding
certificate server is
abnormal.
● The corresponding
certificate is not
within the validity
period.
1. Ensure that the
certificate is
correctly installed.
2. Ensure that the
connection of the
certificate server is
normal.
3. Ensure that the
installed certificate
is within the
validity period.
NetCol5000-C(030, 032, 065) In-row Chilled Water
Smart Cooling Product
User Manual
6 System Operation and Maintenance
Issue 04 (2021-03-15)
Copyright © Huawei Technologies Co., Ltd.
152