Huawei NetCol5000-A User Manual page 147

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Alarm
Alarm
ID
a049 Supply-air
LT
a050 Cold-aisle
HT
a051 Hot-aisle
HT
a052 Supply-air
1 temp
invalid
Supply-air
2 temp
invalid
a053 PSU 1
fault
Issue 01 (2017-07-27)
Alarm
Impact
Severity
Warning The alarm
is
generated.
Critical The alarm
is
generated,
and the
rotational
speed of
the
compresso
r
increases.
Critical The alarm
is
generated.
Major The alarm
is
generated.
Major The alarm
is
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Possible Cause
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.
1. The T/H sensors are
located in inappropriate
position.
2. The load is high or the
refrigeration capacity is
insufficient.
3. The ambient temp is
high.
4. The cold-aisle HT alarm
threshold is
inappropriate.
5. The temp displayed is
different from the actual
temp.
1. The T/H sensors are
located in inappropriate
position.
2. The load is high or the
refrigeration capacity is
insufficient.
3. The ambient temp is
high.
4. The hot-aisle HT alarm
threshold is
inappropriate.
5. The temp displayed is
different from the actual
temp.
1. The cables to the T/H
sensor are loose or
damaged
2. The T/H sensor is faulty.
The PSU is faulty.
5 Operation and Maintenance
Solution
1. Please consult Huawei
technical support.
2. Check other causes if the
alarm persists after
startup.
3. Adjust the supply-air LT
alarm threshold.
4. Calibrate or replace the
abnormal sensors.
5. Maintain or replace the
air filters.
1. Adjust the position of the
T/H sensors.
2. Add more air conditioner
units or Consult
Huawei technical
support.
3. Check other causes if the
alarm persists after
startup.
4. Adjust the cold-aisle HT
alarm threshold.
5. Calibrate or replace the
abnormal sensors.
1. Adjust the position of the
T/H sensors.
2. Add more air conditioner
units or Consult
Huawei technical
support.
3. Check other causes if the
alarm persists after
startup.
4. Adjust the hot-aisle HT
alarm threshold.
5. Calibrate or replace the
abnormal sensors.
1. Remove dirt or water
from the T/H sensor.
2. Maintain or replace the
T/H sensor.
Maintain or replace the PSU.
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