Huawei NetCol8000-C070 User Manual page 152

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Alarm ID Alarm Name
A007-01 Return air 4 temp/
humid sensor comm
failed
A023-01 Electric heater 1 fault
Electric heater 2 fault
Issue 07 (2021-12-30)
Alarm
Severity
Critical
Major
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
● The cables to the
temperature and
humidity sensor are
loose or damaged.
● The DIP switch of
the temperature
and humidity
sensor is set
incorrectly.
● The temperature
and humidity
sensor is faulty.
● The
communications
port of the main
control board is
faulty.
● The cables to the
temperature switch
are loose or
damaged.
● The temperature
switch is faulty.
● The electric heater
is faulty.
6 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.
1. Check cables to the
temperature switch.
2. Maintain or replace
the temperature
switch.
3. Replace the electric
heater.
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