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NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Alarm ID
Alarm Name
Backup power
frequency
abnormal
A281-04
Power voltage
abnormal
Backup power
voltage
abnormal
Issue 06 (2020-01-13)
Alarm
Impact
Severity
supplied.
Major
An alarm is
triggered, and
the smart
cooling product
is shut down
when the
standby power
is supplied.
Major
An alarm is
triggered, and
the smart
cooling product
is shut down
when the main
power or single
power is
supplied.
Major
An alarm is
triggered, and
the smart
cooling product
is shut down
when the
standby power
is supplied.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible
Solution
Cause
board is
voltage
faulty.
detection
board.
1. The power
1. Check that
supply
the power
frequency
supply
exceeds the
voltage is
upper
within the
threshold.
operating
range.
2. The SPD
and voltage
2. Replace the
detection
SPD and
board is
voltage
faulty.
detection
board.
1. The power
1. Check that
supply
the power
voltage is
supply
below the
voltage is
lower
within the
threshold.
operating
range.
2. The cables
to the SPD
2. Check the
and voltage
cable
detection
connection
board are
to the SPD
loose or
and voltage
damaged.
detection
board.
3. The SPD
and voltage
3. Replace the
detection
SPD and
board is
voltage
faulty.
detection
board.
1. The power
1. Check that
supply
the power
voltage is
supply
below the
voltage is
lower
within the
threshold.
operating
range.
2. The cables
to the SPD
2. Check the
and voltage
cable
detection
connection
board are
to the SPD
loose or
and voltage
damaged.
detection
board.
3. The SPD
and voltage
3. Replace the
detection
SPD and
232
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