Huawei NetCol5000-A050 - Page 238

Alarm
ID
Alarm Name Alar
m
Seve
rity
Possible Cause Solution
A28B-0
2
Compressor
high discharge
temperature
alarm
CRITI
CAL
1. The refrigerant
leaks.
2. The condenser
ns are dirty or
blocked.
3. The ambient
temperature
exceeds the upper
threshold.
4. The
temperature
displayed by the
exhaust air
temperature
sensor is
dierent
from the actual
temperature.
5. The input power
of the outdoor
unit has an open
phase, incorrect
phase sequence,
or is unavailable.
6. Cables to the
indoor and
outdoor units are
not properly
connected.
7. The outdoor fan
or its drive is
faulty.
8. The exhaust fan
is faulty.
1. Identify and repair
the leaking point, and
rell refrigerant after
maintenance.
2. Clean the condenser
ns.
3. Measure the ambient
temperature.
4. Calibrate or replace
the temperature sensor.
5. Check the input
power of the outdoor
unit.
6. Check the cables to
the indoor and outdoor
fans.
7. Maintain or replace
the outdoor fan or its
drive.
8. 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. 228