Huawei NetCol8000-A013 User Manual page 104

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (800 mm Width)
ID Alarm
221 Comp Antifrz
Protect Alarm
222 Comp Run
Timeout Alarm
301 EEV Low
Superheat Degree
Alarm
Issue 06 (2022-11-25)
System Causes
Action
The 1. Refrigerant leaks.
compressor
2. The evaporator coil
shuts down.
(The alarm
needs to be
manually
cleared.)
3. The compressor
4. The dryer is blocked.
5. The EEV is blocked.
6. The air vent of the
7. The indoor fan
-- The runtime of the
compressor exceeds
the preset threshold.
The 1. The EEV is faulty or
compressor
shuts down.
2. The cables to the
3. The EEV coil is
4. The EEV plug is
5. The EEV plug is
6. The outdoor
Copyright © Huawei Technologies Co., Ltd.
5 System Operation and Maintenance
pipe temperature
sensor displays an
incorrect
temperature.
suction pressure
sensor displays an
incorrect pressure
after the coil pipe
temperature sensor
is faulty.
indoor unit is
blocked.
rotates reversely.
its step is incorrect.
EEV are loose or
damaged.
loose.
loose.
short-circuited.
temperature sensor
displays an incorrect
temperature or is
faulty.
Solution
1. Identify and repair
the leaking point,
and refill refrigerant
after maintenance.
2. Calibrate or replace
the evaporator coil
pipe temperature
sensor.
3. Calibrate or replace
the suction pressure
sensor.
4. Maintain or replace
the dryer.
5. Maintain or replace
the EEV.
6. Check that the air
vent of the indoor
fan is not blocked.
7. Check cables to the
indoor fan.
Replace the
compressor and clear
the cumulative
runtime.
1. Check and replace
the EEV.
2. Check and replace
the EEV cable.
3. Reinstall the EEV
coil.
4. Secure the plug.
5. Eliminate the short-
circuit fault.
6. Adjust or replace
the outdoor
temperature sensor.
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