Huawei NetCol5000-A User Manual page 146

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Alarm
Alarm
ID
overflow
Smoke
a044
detected
a045 Teamwork
networkin
g failed
a046 Comp
freeze
point
protection
Supply-air
a048
HT
Issue 01 (2017-07-27)
Alarm
Impact
Severity
and the
system
shuts
down.
The alarm
Critical
is
generated,
and the
system
shuts
down.
Major The alarm
is
generated,
and a
message
"Networki
ng failed"
is
displayed.
Major The alarm
is
generated,
and the
compresso
r shuts
down
forcibly.
The alarm
Critical
is
generated,
and the
rotational
speed of
the
compresso
r
increases.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
connected.
3. The water sensor is
faulty.
1. Smoke is generated in the
equipment room.
2. Cables to the smoke
sensor are loose or
damaged.
3. The smoke sensor is
faulty.
1. The DIP switch is set
incorrectly for teamwork.
2. The teamwork cables are
loose or damaged.
3. Any two air conditioner
units have the same
address.
4. No air conditioner unit is
configured as the master
unit.
5. The master unit is
powered off.
1. The solenoid valve is
faulty.
2. The cables to the low
press sensor are loose or
damaged.
3. The low press sensor is
faulty.
4. The dryer filter is
blocked.
5. The expansion valve is
blocked.
6. The indoor fans are
faulty.
7. The ambient temp is low.
1. The load is high, or the
refrigeration capacity is
insufficient.
2. The ambient temp is
high.
3. The supply-air HT alarm
threshold is
inappropriate.
4. The temp displayed is
different from the actual
temp.
5 Operation and Maintenance
Solution
connection to the
overflow sensor.
3. Maintain or replace the
water sensor.
1. Exhaust smoke from the
equipment room and reset
the smoke sensor.
2. Check cables to the
smoke sensor.
3. Maintain or replace the
smoke sensor.
1. Set the DIP switch
correctly for teamwork.
2. Check the teamwork
cables.
3. Change the addresses of
the air conditioner units.
4. Configure one air
conditioner unit as the
master unit.
5. Power on the master unit,
or configure another unit
as the master unit.
1. Maintain or replace the
solenoid coil or the
solenoid valve.
2. Check the cables to the
low press sensor.
3. Maintain or replace the
low press sensor.
4. Maintain or replace the
dryer filter.
5. Maintain or replace the
expansion valve.
6. Maintain or replace the
indoor fans.
7. Check the ambient temp.
1. Add more air conditioner
units or Consult
Huawei technical
support.
2. Check other causes if the
alarm persists after
startup.
3. Adjust the supply-air HT
alarm threshold.
4. Calibrate or replace the
abnormal sensors.
138