Huawei NetCol5000-C030H90D0 User Manual page 144

NetCol5000-C(030, 032, 065) In-row Chilled Water
Smart Cooling Product
User Manual (2019)
Alar
m ID
A080
A090
A091
Issue 03 (2020-08-30)
Alarm Alarm
Name Severi
ty
CW valve WARNI
exceed NG
runtime
alarm
Cond pump WARNI
1 exceed NG
runtime
alarm
Cold aisle WARNI
low NG
temperature
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
The accumulated
runtime of the
chilled water valve
exceeds the alarm
threshold.
Condensate pump
runtime exceeds the
limit.
1. The temperature
sensors or
temperature and
humidity sensors are
located in
inappropriate
positions.
2. The thermal load
power is low.
3. The ambient
temperature is
below the lower
threshold.
4. The low
temperature alarm
threshold is
inappropriate.
5. The value
detected by the
temperature sensor
or temperature and
humidity sensor is
different from the
actual value.
6. The air filters are
blocked.
7. The chilled water
valve is stuck or
faulty.
Solution
Maintain or replace the
chilled water valve and
clear the accumulated
runtime.
Maintain or replace the
condensate pump, and
clear the total runtime.
1. Adjust the positions
of the temperature
sensors or temperature
and humidity sensors.
2. Contact Huawei
technical support.
3. Measure the ambient
temperature. Check
whether other causes
exist if the alarm
persists in a long time
after startup.
4. Adjust the low
temperature alarm
threshold.
5. Calibrate or replace
the temperature sensor
or temperature and
humidity sensor.
6. Maintain or replace
the air filters.
7. Maintain or replace
the chilled water valve.
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