Huawei NetCol5000-A050 - Troubleshooting; The unit generates abnormal voice; The compressor does not work

Alarm
ID
Alarm Name Alar
m
Seve
rity
Possible Cause Solution
A28D-0
1
Compressor
low suction
pressure alarm
MAJ
OR
1. The refrigerant
leaks.
2. The solenoid
valve is faulty.
3. The pressure
displayed is
dierent from the
actual pressure.
4. The
lter dryer
is blocked.
5. The expansion
valve is blocked or
stuck, or the
expansion valve
coil and cable
connections are
faulty.
6. The indoor fan
is faulty.
7. The ambient
temperature is
below the lower
threshold.
1. Identify and repair
the leaking point, and
rell refrigerant after
maintenance.
2. Maintain or replace
the solenoid valve coil
or the solenoid valve.
3. Calibrate or replace
the pressure sensor.
4. Maintain or replace
the
lter dryer.
5. Maintain or replace
the expansion valve or
the coil, and reconnect
cables.
6. Maintain or replace
the indoor fan.
7. Measure the ambient
temperature.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 9 Alarm Reference
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 233