Huawei NetCol5000-C Series User Manual page 156

NetCol5000-C030 In-row Chilled Water Smart Cooling
Product
User Manual (Simple Configuration)
Alarm Alarm Name
ID
a047 No Cooling
Output
a048 Supply-air HT
a049 Supply-air LT
Issue 09 (2020-01-10)
Severity System
Operation
Critical The alarm is
generated, and
the
NetCol5000-C
shuts down.
Critical The alarm is
generated. The
indoor fan has
the maximum
output, and the
value has 100%
outputs in
automatic
running mode.
Warning The alarm is
generated.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
configured as the
master unit.
5. The master unit is
powered off.
1. The cables to the
chilled water
(CW) valve are
loose or damaged.
2. The CW valve is
stuck or faulty.
1. The load is high,
or the refrigeration
capacity is
insufficient.
2. The supply air
temp is higher than
the supply-air HT
alarm threshold
during startup.
3. The ambient temp
is high.
4. The supply-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 supply-air LT
alarm threshold is
inappropriate.
4. The temp
displayed is
different from the
actual temp.
5. The air filters are
blocked.
6. The CW valve is
Recovery Measures
another unit as the
master unit.
1. Check the cables to
the CW valve.
2. Maintain or replace
the CW valve.
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 supply-air
HT alarm threshold.
5. Calibrate or replace
the abnormal
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 supply-air
LT alarm threshold.
4. Calibrate or replace
the abnormal
sensors.
5. Maintain or replace
the air filters.
6. Maintain or replace
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