Alar
m ID
Alarm
Name
Alarm
Severi
ty
Possible Cause
Solution
PSU 2
communicati
on failed
control board is
faulty.
A077
Indoor fan 1
fault
MAJO
R
1. The power supply
to the indoor fan is
abnormal.
2. The cable to the
indoor fan is not
connected properly.
3. The indoor fan is
faulty.
1. Check the power
supply to the indoor
fan.
2. Check the cable
connection to the
indoor fan.
3. Maintain or replace
the indoor fan.
Indoor fan 2
fault
Indoor fan 3
fault
Indoor fan 4
fault
Indoor fan 5
fault
Indoor fan 6
fault
Indoor fan 7
fault
Indoor fan 8
fault
Indoor fan 9
fault
Indoor fan
10 fault
A079
Drain
abnormal
alarm
MAJO
R
1. The drainage
filter is blocked.
2. The drainpipe is
blocked.
3. The condensate
pump is faulty.
4. The low liquid
level sensor is faulty.
1. Clear the foreign
matter in the water pan
and filter.
2. Check that the
drainpipe is not blocked
or bent.
3. Check the cables to
the condensate pump,
clear the foreign matter
in the condensate
pump, or replace the
condensate pump.
4. Check the cables to
the low liquid level
sensor, clear the
obstacles, or replace the
low liquid level sensor.
NetCol5000-C(030, 032, 065) In-row Chilled Water
Smart Cooling Product
User Manual (2019)
6 System Operation and Maintenance
Issue 03 (2020-08-30)
Copyright © Huawei Technologies Co., Ltd.
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