Huawei NetCol8000-A045D User Manual page 260

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Alarm ID Alarm Name
A28E-20 Compressor 1 drive
alarm
Compressor 2 drive
alarm
A28F-01 Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
A28F-02 Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
A28F-04 Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
Issue 05 (2020-10-10)
Alarm
Severity
Major
Major
Major
Major
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
● The fans in the
compressor drive
are faulty.
● The air vents of the
fans in the
compressor drive
are dirty or
blocked.
● The compressor
drive heat sink is
dirty, so the heat
exchange effect is
poor.
● The electric control
box cavity is dirty
or blocked, and the
module heat
exchange effect is
poor.
● The drive module is
faulty.
● The power supply
voltage is low.
● The compressor
drive is faulty.
● The primary power
supply is faulty or
the cables to the
compressor drive
are loose or
damaged.
● The power supply
voltage is high.
● The compressor
drive is faulty.
● The cables to phase
U of the
compressor drive
are loose or
damaged.
● The compressor
drive is faulty.
10 Alarm Reference
Solution
1. Check the fans in
the compressor
drive.
2. Clean the air vents
of the fans in the
compressor drive.
3. Clean the heat sink
after power-off.
4. Clean the cavity
after power-off.
5. Replace the drive
module.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
3. Check the primary
power supply or
the cable
connection to the
compressor drive.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
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