Huawei NetCol5000-A050 User Manual page 218

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
Alarm
ID
A143-0
2
A146-0
1
Issue 08 (2021-09-17)
Alarm Name Alar
m
Seve
rity
Outdoor unit MAJ
communicatio OR
n failed
Outdoor fan MAJ
blocked alarm OR
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
1. The
communications
cable to the
temperature
control intelligent
monitoring board
is not properly
connected.
2. The
temperature
control intelligent
monitoring board
is faulty.
3. The power
supply to the
temperature
control intelligent
monitoring board
is abnormal.
4. The main
control module is
faulty.
5. The external fan
speed is too high.
6. The outdoor fan
is faulty.
1. The outdoor fan
is blocked.
2. The outdoor fan
is faulty.
9 Alarm Reference
Solution
1. Check the
communications cable
connection to the
temperature control
intelligent monitoring
board.
2. Replace the
temperature control
intelligent monitoring
board.
3. Check the power
cable connection to the
temperature control
intelligent monitoring
board.
4. Replace the main
control module.
5. If the fan is working
properly, add a baffle
plate on the air return
side of the outdoor
unit.
6. Replace the outdoor
fan.
1. Clear obstacles from
the outdoor fan to
ensure that it works
properly.
2. Replace the outdoor
fan.
208