Huawei NetCol5000-A025 User Manual page 197

NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width)
Al
ar
m
ID
a0
2
5
a0
2
7
a0
3
8
a0
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Issue 15 (2020-12-10)
Alarm Ala Impact
Name rm
Sev
erit
y
Return WA Generates
air RNI an alarm
filter NG and shuts
blocked down the
alarm electric
heater and
humidifier.
Power WA Generates
loss RNI an alarm.
alarm NG
Compre MA Generates
ssor JOR an alarm.
Liquid
pipe
temp
sensor
fault
PSU 1 MA Generates
power JOR an alarm.
supply
abnorm
al
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
1. Air filters are
blocked or dirty.
2. The differential
pressure switch
is faulty.
3. An inappropriate
threshold is set
for the
differential
pressure switch.
4. The pressure
tube of the
differential
pressure switch
is blocked or
disconnected.
5. The cables to
the differential
pressure switch
are loose or
damaged.
The power supply is
cut off.
1. The cables to
the liquid pipe
temperature
sensor are loose
or damaged.
2. The liquid pipe
temperature
sensor is faulty.
The input power
cables of the PSU
are loose or
damaged.
Solution
1. Maintain or replace
the air filters.
2. Replace the
differential
pressure switch.
3. Adjust the
threshold set for
the differential
pressure switch.
4. Dredge or replace
the pressure tube.
5. Check the cables to
the differential
pressure switch.
If power failure occurs
on the power system,
no maintenance is
needed. If it occurs in
other places, check
the power supply
cables.
1. Check the cables to
the liquid pipe
temperature
sensor.
2. Maintain or replace
the liquid pipe
temperature
sensor.
Check the input
power cables of the
PSU.
187