Huawei FusionCol8000-E240 User Manual page 172

FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
Alarm ID Alarm Name
A174-01 SPD function failure
Backup SPD function
failed
Auxiliary cooling SPD
and voltage detection
board function failure
A174-02 SPD function failure
A184-01 Compressor 1
preheating alarm
Compressor 2
preheating alarm
Compressor 3
preheating alarm
A193-01 Air-side diff pressure
sensor fault
Issue 02 (2021-04-15)
Alarm
Severity
Major
Major
Warning
Major
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
The SPD and voltage
detection board is
faulty.
● The SPD is faulty.
● The cable to the
SPD is not
connected properly.
● The compressor is
preheated before
startup.
● The compressor is
preheated after a
power failure.
● The cable to the
differential pressure
sensor is loose or
damaged.
● The pressure tube
of the differential
pressure sensor is
reversely
connected.
● The differential
pressure sensor is
faulty.
8 System Maintenance
Solution
Replace the SPD and
voltage detection
board.
1. Replace the SPD.
2. Check the cable
connection to the
SPD.
1. Start the
equipment after
preheating is
complete, or set
the Compressor
preheating
parameter to Off
to stop preheating.
2. Wait until
compressor
preheating is
complete, or set
the Compressor
preheating
parameter to Off
to stop preheating.
1. Check the cable
connection to the
differential pressure
sensor.
2. Check the tube
connection to the
differential pressure
sensor.
3. Maintain or replace
the differential
pressure sensor.
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