Huawei NetCol8000-A045D User Manual page 235

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Alarm ID Alarm Name
A025-01 Return air filter
blocked alarm
A027-01 Power loss alarm
A038-01 Compressor 1 liquid
pipe temp sensor fault
Compressor 2 liquid
pipe temp sensor fault
A042-01 Remote shutdown
alarm
Issue 05 (2020-10-10)
Alarm
Severity
Warning
Warning
Major
Critical
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
● Air filters are
blocked or dirty.
● The differential
pressure switch is
faulty.
● An inappropriate
threshold is set for
the differential
pressure switch.
● The pressure tube
of the differential
pressure switch is
blocked or
disconnected.
● The cables to the
differential pressure
switch are loose or
damaged.
The power supply is
cut off.
● The cables to the
liquid pipe
temperature sensor
are loose or
damaged.
● The liquid pipe
temperature sensor
is faulty.
● The remote
shutdown dry
contact is triggered.
● The cables to the
remote shutdown
dry contact are
loose or damaged.
10 Alarm Reference
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.
1. Check the status of
the remote
shutdown dry
contact.
2. Check the cables to
the remote
shutdown dry
contact.
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