Huawei NetCol5000-A User Manual page 171

NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
Alar Alarm
Alarm
m Severit
ID y
a023 Electric Major
heater
HT
a024 Elec Warnin
heater g
exceed
runtime
Air Warnin
a025
filter g
blocked
a026 Air Warnin
filter g
exceed
runtime
a027 Power Warnin
loss g
Issue 13 (2019-01-15)
Default
Impact
Value
N/A The alarm
is
generated
, and the
electric
heater
shuts
down
forcibly.
30000 The alarm
hours is
generated
.
The alarm
N/A
is
generated
.
4320 The alarm
hours is
generated
.
N/A The alarm
is
generated
.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Cause
1. The temp switch probes
are located
inappropriately.
2. The cables to the temp
switch of the electric
heater are loose or
damaged.
3. The temp switch is
faulty.
4. The manual reset temp
switch is not reset.
5. The indoor fans are
faulty.
The accumulated runtime
of the electric reheat
exceeds the alarm thres.
1. Air filters are blocked.
2. The differential press
switch is faulty.
3. The differential press
switch is set
inappropriately.
4. The press tube is
blocked or cracked, or
is located in an
inappropriate position.
5. The cables to the
differential press switch
are loose or damaged.
The accumulated runtime
of the air filters exceeds the
alarm thres.
The supply power is cut
off.
Solution
1. Adjust the positions of
the temp switch
probes.
2. Check the cables to the
temp switch of the
electric reheat.
3. Maintain or replace the
temp switch.
4. Reset the manual reset
temp switch.
5. Maintain or replace the
indoor fans.
Maintain or replace the
electric heater. Tap
Maint > Performance
Maint to clear the
accumulated runtime.
1. Maintain or replace the
air filters.
2. Replace the
differential press
switch.
3. Adjust the thres of the
differential press
switch.
4. Maintain or replace the
press tube.
5. Check the cables to the
differential press
switch.
Maintain or replace the air
filters. Tap Maint >
Performance Maint to
clear the accumulated
runtime.
Check the power supply
cables.
162