Huawei NetCol5000-C030H90D0 User Manual page 142

NetCol5000-C(030, 032, 065) In-row Chilled Water
Smart Cooling Product
User Manual (2019)
Alar
m ID
A051
A053
A054
Issue 03 (2020-08-30)
Alarm Alarm
Name Severi
ty
Hot aisle CRITC
high AL
temperature
alarm
PSU 1 fault MAJO
R
PSU 2 fault
PSU 1 MAJO
communicati R
on failed
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
1. The temperature
sensors or
temperature and
humidity sensors are
located in
inappropriate
positions.
2. The thermal load
power is high or the
cooling capacity is
insufficient.
3. The ambient
temperature exceeds
the upper threshold.
4. The high
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 chilled water
flow is insufficient,
or the supply water
temperature is high.
7. The chilled water
valve is stuck or
faulty.
The PSU is faulty.
1. The
communications
cables of the PSU
are loose or
damaged.
2. The PSU is faulty.
3. The
communications
port of the main
Solution
1. Adjust the positions
of the temperature
sensors or temperature
and humidity sensors.
2. Add air conditioners
or 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 high
temperature alarm
threshold.
5. Calibrate or replace
the temperature sensor
or temperature and
humidity sensor.
6. Check the pressure
and temperature of
chilled water.
7. Maintain or replace
the chilled water valve.
Maintain or replace the
PSU.
1. Check the
communications cables
of the PSU.
2. Maintain or replace
the PSU.
3. Maintain or replace
the main control board.
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