Huawei NetCol8000-A Series User Manual page 160

NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual
Alarm Alarm
ID Name
a021 Humidifie
r locked
a022 Humidifie
r exceed
runtime
a023 Elec
heater HT
a024 Elec
heater
exceed
runtime
Issue 10 (2019-01-15)
Alarm Occurrence
Severit Conditions
y
water pan is
triggered, and
the filter
clogging
switch is
closed and
does not
recover for N
s.
Critical The infrared
humidifier
water pan has
generated
three dry
heating alarms
within one
hour.
Warning The
cumulative
running period
of the infrared
humidifier is
greater than or
equal to the
alarm
threshold.
Major The electric
heater
overtemperatu
re switch is
triggered, and
the airflow
loss
differential
pressure
switch is
closed and
does not
recover for N
s.
Warning The
cumulative
running period
of an electric
heater is
greater than or
equal to the
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
temperature switches are
loose or damaged.
4. Temperature switches are
faulty.
The a020 humidifier pan no
water alarm is generated
frequently.
The accumulated runtime of
the humidifier exceeds the
alarm threshold.
1. Temperature switch probes
are located
inappropriately.
2. The cables to the temp
switch of the electric
reheat are loose or
damaged.
3. The temperature switch is
faulty.
4. The manual reset
temperature switch is not
reset.
5. The indoor fans are faulty.
The accumulated runtime of
the electric reheat exceeds the
alarm threshold.
Solutions
3. Check cables to the
humidifier
temperature
switches.
4. Maintain or replace
the humidifier
temperature
switches.
Reference to the
solutions for the a020
humidifier pan no water
alarm.
Maintain or replace the
humidifier and clear the
accumulated runtime.
1. Adjust the positions
of the temperature
switch probes.
2. Check the cables to
the temp switch of
the electric reheat.
3. Maintain or replace
the temperature
switch.
4. Reset the manual
reset temperature
switch.
5. Maintain or replace
the indoor fans.
Maintain or replace the
electric reheat and clear
the accumulated
runtime.
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