NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
abnormal
L1/L2
disconnect
incorrect for slave units.
2. Teamwork settings are
incorrect for the master
unit.
3. A slave unit is power off
or offline.
4. The ETH converter is
faulty.
5. The smart socket is
faulty.
6. The cables are faulty
between the air
conditioner and the smart
socket or monitoring
host.
fan.
2. Modify teamwork
settings for slave units to
enable slave units to join
the teamwork group.
3. Check the cable
connection and running
conditions of the slave
units.
4. Maintain or replace the
ETH converter.
5. Maintain or replace the
smart socket.
6. Maintain or replace the
cables between the air
conditioner and the smart
socket or monitoring
host.
Water
inlet
solenoid
valve fault
The alarm
is
generated,
and the
humidifier
shuts
down.
The water inlet solenoid
valve is faulty.
Replace the water inlet
solenoid valve.
Suction
temp
sensor
fault
1. Cables to the suction
temperature sensor are
not properly connected.
2. The suction temperature
sensor is faulty.
1. Check cables to the
suction temperature
sensor.
2. Maintain or replace the
suction temperature
sensor.
EEV low
overheatin
g degree
The alarm
is
generated,
and the
compresso
r shuts
down.
1. The electronic expansion
valve coil is loose.
2. The electronic expansion
valve coil is faulty.
3. The electronic expansion
valve is faulty.
1. Reinstall the electronic
expansion valve coil.
2. Replace the electronic
expansion valve coil.
3. Replace the electronic
expansion valve.
EEV low
overheatin
g locked
The alarm
is
generated,
and the
compresso
r shuts
down.
The EEV low overheating
degree alarm is generated
several times within a certain
period.
Refer to the solutions for the
a136 EEV low overheating
degree alarm.
1. The suction pressure
sensor is faulty.
2. The suction temperature
1. Verify that the suction
pressure sensor works
properly.
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