Alarm ID
Alarm Name
Alarm
Severity
Possible Cause
Solution
A28F-04
Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
Compressor 3 drive
power supply
abnormal
Major
● The cables to phase
U of the
compressor drive
are loose or
damaged.
● The compressor
drive is faulty.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
A28F-08
Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
Compressor 3 drive
power supply
abnormal
Major
● The cables to phase
V of the
compressor drive
are loose or
damaged.
● The compressor
drive is faulty.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
A28F-10
Compressor 1 drive
power supply
abnormal
Compressor 2 drive
power supply
abnormal
Compressor 3 drive
power supply
abnormal
Major
● The cables to phase
W of the
compressor drive
are loose or
damaged.
● The compressor
drive is faulty.
1. Check the power
supply voltage.
2. Maintain or replace
the compressor
drive.
A291-01
A291-02
Compressor 1
overcurrent alarm
Compressor 2
overcurrent alarm
Compressor 3
overcurrent alarm
Major
● The compressor
lacks oil.
● The condenser fins
are dirty or
blocked.
● The outdoor fan is
abnormal.
● The refrigerant is
overfilled.
● The compressor is
faulty.
1. Fill oil to the
compressor.
2. Clean the
condenser fins.
3. Maintain or replace
the outdoor fan.
4. Decrease certain
amount of
refrigerant.
5. Maintain or replace
the compressor.
FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
8 System Maintenance
Issue 02 (2021-04-15)
Copyright © Huawei Technologies Co., Ltd.
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