Huawei NetCol8000-C User Manual page 181

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
Alar Alarm
m ID Name
damper
humid
invalid
a007 Return air
1/2/3/4 T/H
brd comm
failed
Fresh air
temp/humid
board comm
failed
Return air
temp/humid
board comm
failed
a018 Indoor fan
12/3/4
exceed
runtime
a20a Indoor fan
1/2/3/4 drive
overheated
a20b Indoor fan
1/2/3/4 drive
open-phase
a20c Indoor fan
1/2/3/4 input
overvoltage
a20d Indoor fan
1/2/3/4 drive
DC
overvoltage
a20e Indoor fan
1/2/3/4 drive
DC
undervoltag
e
a20f Indoor fan
1/2/3/4
grounding
faulty
Issue 06 (2020-01-13)
Alarm Impact
Severi
ty
Major An alarm is
triggered.
Major An alarm is
triggered.
Critical N/A
Critical N/A
Major N/A
Major N/A
Major N/A
Major N/A
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
1. The cables to the
temperature and humidity
sensor are loose or
damaged.
2. The DIP switch of the
temperature and humidity
sensor is set incorrectly.
3. The temperature and
humidity sensor is faulty.
4. The communications port
of the main control board is
faulty.
The accumulated runtime of
the fan exceeds the alarm
threshold.
The indoor fan is faulty.
1. The cables to the indoor fan
are loose or damaged.
2. The indoor fan is faulty.
The indoor fan is faulty.
The indoor fan is faulty.
1. The cables to the indoor fan
are loose or damaged.
2. The indoor fan is faulty.
1. The indoor fan ground
cable is not properly
connected.
2. The indoor fan is faulty.
6 System Operation and Maintenance
Solution
1. Check the cables to
the temperature and
humidity sensor.
2. Set the DIP switch of
the temperature and
humidity sensor
correctly.
3. Maintain or replace
the temperature and
humidity sensor.
4. Maintain or replace
the main control
board.
Maintain or replace the
indoor fan and clear the
accumulated runtime.
Maintain or replace the
indoor fan.
1. Check the cables to
the indoor fan.
2. Maintain or replace
the indoor fan.
Maintain or replace the
indoor fan.
Maintain or replace the
indoor fan.
1. Check the cables to
the indoor fan.
2. Maintain or replace
the indoor fan.
1. Check the ground
cable connection to
the indoor fan.
2. Maintain or replace
the indoor fan.
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