Huawei NetCol8000-C070 User Manual page 143

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Alar
m ID
A022
A023
A025
Issue 02 (2020-08-30)
Alarm Alarm Possible Cause
Name Severi
ty
Humidifi Warni The accumulated runtime
er exceed ng of the wet film of the
runtime humidifier exceeds the
alarm alarm threshold.
Electric Major 1. The cables to the
heater 1 temperature switch are
fault loose or damaged.
2. The temperature
switch is faulty.
3. The electric heater is
faulty.
Electric Major 1. The cables to the
heater 2 temperature switch are
fault loose or damaged.
2. The temperature
switch is faulty.
3. The electric heater is
faulty.
Return Warni 1. Air filters are blocked
air filter ng or dirty.
blocked
2. The differential
alarm
pressure switch is faulty.
3. An inappropriate
threshold is set for the
differential pressure
switch.
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.
6. The air damper for the
air filter is faulty.
7. The air damper for the
air filter is not enabled.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
Maintain or replace
the wet film of the
humidifier and clear
the accumulated
runtime.
1. Check the cables to
the temperature
switch.
2. Maintain or replace
the temperature
switch.
3. Replace the electric
heater.
1. Check the cables to
the temperature
switch.
2. Maintain or replace
the temperature
switch.
3. Replace the electric
heater.
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.
6. Maintain or replace
the air damper for the
air filter.
7. Enable the air
damper for the air
filter.
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