Alarm Reference - Huawei NetCol5000-C User Manual

NetCol5000-C Chilled Water-Cooled In-Row Precision
Air Conditioner
User Manual
Maintenance
Item

6.3 Alarm Reference

Table 6-5
Table 6-5 Alarm reference
Alarm Alarm Name
ID
a001 Return-air 1/2
temp invalid
a002 Return-air HT
a003 Return-air LT
Issue 02 (2013-12-10)
Operation
cables.
describes the NetCol5000-C alarm reference.
Severity System
Operation
Major The alarm is
generated.
Critical The alarm is
generated. The
indoor fan has
the maximum
output, and the
CW valve has
100% outputs
in automatic
running mode.
Warning The alarm is
generated.
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6 System Operation and Maintenance
Possible Causes
1. The return air
temperature sensor is
faulty.
2. Cables to the return
air temperature
sensor are loose or
damaged.
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. 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
Recovery Measures
1. Maintain or replace
the return air
temperature sensor.
2. Check cables to the
return air
temperature sensor.
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.
1. Adjust the return-air
low temperature
alarm set point.
2. Maintain or replace
the temperature and
humidity sensor.
3. Maintain or replace
104