Huawei NetCol5000-A050 - Page 241

Alarm
ID
Alarm Name Alar
m
Seve
rity
Possible Cause Solution
A28C-0
1
Compressor
high discharge
pressure alarm
MAJ
OR
1. The input power
of the outdoor
unit has an open
phase, incorrect
phase sequence,
or is unavailable.
2. Cables to the
indoor and
outdoor units are
not properly
connected.
3. The condenser
ns are dirty or
blocked.
4. The outdoor fan
or its drive is
faulty.
5. The pressure
displayed is
dierent from the
actual pressure.
6. The refrigerant
is
overlled.
7. The exhaust fan
is faulty.
1. Check the input
power of the outdoor
unit.
2. Check the cables to
the indoor and outdoor
fans.
3. Clean the condenser
ns.
4. Maintain or replace
the outdoor fan or its
drive.
5. Calibrate or replace
the pressure sensor.
6. Decrease certain
amount of refrigerant.
7. Maintain or replace
the exhaust fan.
NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual 9 Alarm Reference
Issue 08 (2021-09-17) Copyright © Huawei Technologies Co., Ltd. 231