Huawei NetCol8000-E220 User Manual page 154

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Alar
m ID
A025
-01
A026
-01
A026
-01
A027
-01
A038
-01
Issue 06 (2020-08-19)
Alarm Alarm Name
Severit
y
WARNI Outdoor
NG intake air
filter blocked
alarm
WARNI Return air
NG filter exceed
runtime
alarm
WARNI Outdoor
NG intake air
filter exceed
runtime
alarm
WARNI Power loss
NG alarm
MAJOR Compressor 1
Liquid pipe
temp sensor
fault
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Probable Cause
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 accumulated
runtime of the air
filter exceeds the
alarm threshold.
The accumulated
runtime of the air
filter exceeds the
alarm threshold.
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.
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.
1. Maintain or replace
the air filter and clear
the accumulated
runtime.
1. Maintain or replace
the air filter and clear
the accumulated
runtime.
1. 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.
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