Huawei NetCol5000-A050 User Manual page 237

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
Alarm
ID
A282-0
8
A282-1
0
A28B-0
1
Issue 08 (2021-09-17)
Alarm Name Alar
m
Seve
rity
Backup power MAJ
phase OR
sequence
abnormal
Backup power MAJ
phase OR
sequence
abnormal
Compressor MAJ
high discharge OR
temperature
alarm
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
1. The power grid
is unstable.
2. The phase B
input cable is
faulty.
1. The power grid
is unstable.
2. The phase C
input cable is
faulty.
1. The refrigerant
leaks.
2. The condenser
fins are dirty or
blocked.
3. The ambient
temperature
exceeds the upper
threshold.
4. The
temperature
displayed by the
exhaust air
temperature
sensor is different
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 or outdoor
fan are not
properly
connected.
7. The outdoor fan
or its drive is
faulty.
8. The exhaust fan
is faulty.
9 Alarm Reference
Solution
1. Check the power
grid.
2. Rectify the fault of
the phase B input cable.
1. Check the power
grid.
2. Rectify the fault of
the phase C input cable.
1. Identify and repair
the leaking point, and
refill refrigerant after
maintenance.
2. Clean the condenser
fins.
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.
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