Huawei NetCol5000-C - Alarm Reference

NetCol5000-C Chilled Water-Cooled In-Row Precision
Air Conditioner
User Manual
6 System Operation and Maintenance
Issue 02 (2013-12-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
104
Maintenance
Item
Operation
cables.
6.3 Alarm Reference
Table 6-5 describes the NetCol5000-C alarm reference.
Table 6-5 Alarm reference
Alarm
ID
Alarm Name
Severity
System
Operation
Possible Causes
Recovery Measures
a001
Return-air 1/2
temp invalid
Major
The alarm is
generated.
1. The return air
temperature sensor is
faulty.
2. Cables to the return
air temperature
sensor are loose or
damaged.
1. Maintain or replace
the return air
temperature sensor.
2. Check cables to the
return air
temperature sensor.
a002
Return-air HT
Critical
The alarm is
generated. The
indoor fan has
the maximum
output, and the
CW valve has
100% outputs
in automatic
running mode.
1. The return-air high
temperature alarm set
point is inappropriate
for the working
conditions.
2. The temperature
displayed on the LCD
is different from the
actual temperature.
3. The chilled water
flow is insufficient,
or the supply water
temperature is high.
4. The chilled water
valve is faulty.
5. The cooling capacity
of the NetCol5000-C
is insufficient due to
high load.
6. The ambient
temperature is high.
1. Adjust the return-air
high temperature
alarm set point.
2. Maintain or replace
the temperature and
humidity sensor.
3. Check the pressure
and temperature of
the supplied chilled
water.
4. Maintain or replace
the chilled water
valve.
5. Add more
NetCol5000-C units.
6. Check the ambient
temperature.
a003
Return-air LT
Warning
The alarm is
generated.
1. The return-air low
temperature alarm set
point is inappropriate
for the working
conditions.
2. The temperature
displayed on the LCD
is different from the
1. Adjust the return-air
low temperature
alarm set point.
2. Maintain or replace
the temperature and
humidity sensor.
3. Maintain or replace