Alarm ID
Alarm Name
Alarm
Severity
Possible Cause
Solution
A077-02
A077-10
Indoor fan 1 fault
Indoor fan 2 fault
Indoor fan 3 fault
Indoor fan 4 fault
Indoor fan 5 fault
Exhaust fan 1 fault
Exhaust fan 2 fault
Exhaust fan 3 fault
Exhaust fan 4 fault
Major
The fan is faulty.
Maintain or replace
the fan.
A077-04
A077-08
Indoor fan 1 fault
Indoor fan 2 fault
Indoor fan 3 fault
Indoor fan 4 fault
Indoor fan 5 fault
Exhaust fan 1 fault
Exhaust fan 2 fault
Exhaust fan 3 fault
Exhaust fan 4 fault
Major
The fan drive is faulty.
If the drive is
integrated into the
fan, replace the fan.
If the drive is separate
from the fan, replace
the drive.
A077-20
Indoor fan 1 fault
Indoor fan 2 fault
Indoor fan 3 fault
Indoor fan 4 fault
Indoor fan 5 fault
Exhaust fan 1 fault
Exhaust fan 2 fault
Exhaust fan 3 fault
Exhaust fan 4 fault
Major
● The ground cable
to the fan is not
connected properly.
● The fan is faulty.
1. Check the ground
cable connection to
the fan.
2. Maintain or replace
the fan.
A089-01
Compressor 1 drive
speed limit alarm
Compressor 2 drive
speed limit alarm
Compressor 3 drive
speed limit alarm
Major
● The compressor
lacks oil.
● The refrigerant
leaks.
1. Fill oil to the
compressor.
2. Identify and repair
the leaking point,
and refill
refrigerant after
maintenance.
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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