Huawei NetCol5000-C Series User Manual page 152

NetCol5000-C030 In-row Chilled Water Smart Cooling
Product
User Manual (Simple Configuration)
Table 6-2 Alarm reference
Alarm Alarm Name
ID
a001 Return-air 1/2
temp invalid
a002 Return-air HT
a003 Return-air LT
a004 Return-air 3
humid invalid
Issue 09 (2020-01-10)
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.
Major The alarm is
generated.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
1. The cables to the
temperature sensor
are loose or
damaged.
2. The temperature
sensor is faulty.
1. The load is high or
the refrigeration
capacity is
insufficient.
2. The return air
temp is higher than
the return-air HT
alarm threshold
during startup.
3. The ambient temp
is high.
4. The return-air HT
alarm threshold is
inappropriate.
5. The temp
displayed is
different from the
actual temp.
6. CW flow is
insufficient, or the
supply water temp
is high if cooling
source is CW.
7. The CW valve is
faulty if cooling
source is CW.
1. The load is low.
2. The ambient temp
is low.
3. The return-air LT
alarm threshold is
inappropriate.
4. The temp
displayed is
different from the
actual temp.
5. The CW valve is
faulty if cooling
source is CW.
1. The cables to the
T/H sensor are
loose or damaged.
Recovery Measures
1. Check the cables to
the temperature
sensor.
2. Maintain or replace
the temperature
sensor.
1. Add more smart
cooling product
units.
2. Check other causes
if the alarm persists
after startup.
3. Check the ambient
temp.
4. Adjust the return-air
HT alarm threshold.
5. Calibrate or replace
the abnormal temp
sensors.
6. Check the press and
the temp of CW.
7. Maintain or replace
the faulty CW valve.
1. Please consult
Huawei technical
support.
2. Check the ambient
temp.
3. Adjust the return-air
LT alarm threshold.
4. Calibrate or replace
the abnormal temp
sensors.
5. Maintain or replace
the faulty CW valve.
1. Check cables to the
temperature sensor.
Calibrate or replace
143