Huawei NetCol5000-C Series User Manual page 118

NetCol5000-C(065, 080) In-row Chilled Water Smart
Cooling Product
User Manual
Alarm Alarm Name
ID
temperature
and humidity
board
communication
failed
a018 Indoor fan
exceed runtime
alarm
a025 Air filter
blocked alarm
a026 Air filter
exceed runtime
alarm
a027 Power loss
alarm
a034 Power
Issue 07 (2020-03-16)
Alarm Impact
Severity
alarm
Warning Generates an
alarm
Warning Generates an
alarm and shuts
down the electric
heater/humidifier.
Warning Generates an
alarm
Warning Generates an
alarm
Major Generates an
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
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 indoor
fan exceeds the alarm
threshold.
1. Air filters are
blocked or dirty.
2. The differential
pressure switch is
faulty.
3. The threshold of air
filter blockage set for
the differential pressure
switch is inappropriate.
4. The pressure tube of
the differential pressure
switch is blocked or
disconnected.
5. The cables to the
differential pressure
switch are loose or
damaged.
The accumulated
runtime of the air filter
exceeds the alarm
threshold.
The power supply is cut
off.
The power supply
Solution
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.
1. Maintain or replace
the air filters.
2. Replace the
differential pressure
switch.
3. Adjust the threshold
set for the differential
pressure switch.
4. Dredge or replace
the pressure tube.
5. Check the cables to
the differential
pressure switch.
Maintain or replace
the air filter and clear
the accumulated
runtime.
If power failure
occurs on the power
system, no
maintenance is
needed. If it occurs in
other places, check the
power supply cables.
Check the power
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