Huawei NetCol8000-C070 User Manual page 166

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Alarm ID Alarm Name
A273-01 Teamwork function
abnormal alarm
A278-04 Chilled water valve
fault
A279-04 Motorized damper
fault
Return air damper
fault
Fresh air damper fault
Issue 07 (2021-12-30)
Alarm
Severity
Major
Major
Critical
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
● All sensors for
controlling the
indoor fan are
disabled.
● All cables to the
sensors for
controlling the
indoor fan are
loose or damaged.
● All sensors for
controlling the
indoor fan are
faulty.
● The cables to the
chilled water valve
are loose or
damaged.
● The chilled water
valve is faulty.
● The control cable
to the air damper is
loose or damaged.
● The air damper is
faulty.
6 Maintenance
Solution
1. Enable the sensors
for controlling the
indoor fan.
2. Check the cable
connections to the
sensors for
controlling the
indoor fan.
3. Maintain or replace
the sensors for
controlling the
indoor fan.
1. Check the control
cable connection to
the chilled water
valve.
2. Maintain or replace
the chilled water
valve.
1. Check the control
cable connection to
the air damper.
2. Maintain or replace
the air damper.
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