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Alar
m ID
Alarm
Name
Alarm
Severi
ty
Possible Cause
Solution
A025
Return air
filter
blocked
alarm
WARNI
NG
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.
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.
A026
Return air
filter exceed
runtime
alarm
WARNI
NG
The accumulated
runtime of the air
filter exceeds the
alarm threshold.
Maintain or replace the
air filter and clear the
accumulated runtime.
A027
Power loss
alarm
WARNI
NG
The power supply is
cut off.
If power failure occurs
on the power system,
no maintenance is
needed. If it occurs in
other places, check the
power supply cables.
A040
PSU 1 power
supply
abnormal
MAJO
R
The input power
cables of the PSU
are loose or
damaged.
Check the input power
cables of the PSU.
PSU 2 power
supply
abnormal
A042
Remote
shutdown
alarm
CRITC
AL
1. The remote
shutdown dry
contact is triggered.
2. The cables to the
remote shutdown
dry contact are
loose or damaged.
1. Check the status of
the remote shutdown
dry contact.
2. Check the cables to
the remote shutdown
dry contact.
NetCol5000-C(030, 032, 065) In-row Chilled Water
Smart Cooling Product
User Manual (2019)
6 System Operation and Maintenance
Issue 03 (2020-08-30)
Copyright © Huawei Technologies Co., Ltd.
130