Huawei NetCol5000-C Series User Manual page 157

NetCol5000-C030 In-row Chilled Water Smart Cooling
Product
User Manual (Simple Configuration)
Alarm Alarm Name
ID
a050 Cold-aisle HT
a051 Hot-aisle HT
Issue 09 (2020-01-10)
Severity System
Operation
Critical The alarm is
generated. The
indoor fan has
the maximum
output, and the
CW value has
100% outputs in
automatic
running mode.
Critical The alarm is
generated. The
indoor fan has
the maximum
output, and the
electromagnetic
valve and
actuator has
100% outputs in
automatic
running mode.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
faulty if cooling
source is CW.
1. The cold-aisle T/H
sensors are located
in inappropriate
position.
2. The ambient temp
is high.
3. The cold-aisle HT
alarm threshold is
inappropriate.
4. The temp
displayed is
different from the
actual temp.
5. The load is high or
the refrigeration
capacity is
insufficient.
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 hot-aisle T/H
sensors are located
in inappropriate
position.
2. The ambient temp
is high.
3. The hot-aisle HT
alarm threshold is
inappropriate.
4. The temp
displayed is
different from the
actual temp.
5. The load is high or
the refrigeration
capacity is
insufficient.
6. CW flow is
insufficient, or the
supply water temp
is high if cooling
source is CW.
Recovery Measures
the faulty CW valve.
1. Adjust the position
of the cold-aisle T/H
sensors.
2. Check the ambient
temp.
3. Adjust the cold-aisle
HT alarm threshold.
4. Calibrate or replace
the abnormal T/H
sensors.
5. Add more smart
cooling product
units.
6. Check the press and
the temp of CW.
7. Maintain or replace
the faulty CW valve.
1. Adjust the position
of the hot-aisle T/H
sensors.
2. Check the ambient
temp.
3. Adjust the hot-aisle
HT alarm threshold.
4. Calibrate or replace
the abnormal T/H
sensors.
5. Add more smart
cooling product
units.
6. Check the press and
the temp of CW.
7. Maintain or replace
the faulty CW valve.
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