Huawei NetCol8000-E220 User Manual page 158

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual
Alarm Alarm
ID Severity
A28D- CRITICA
01 L
A28D- CRITICA
01 L
A28D- CRITICA
02 L
Issue 02 (2019-10-10)
Alarm
Probable Cause
Name
faulty.
7. The refrigerant is overfilled.
8. The exhaust fan is faulty.
Comp 1 low 1. The refrigerant leaks.
suction
2. The pressure displayed is
pressure
different from the actual pressure.
alarm
3. The filter dryer is blocked.
4. The expansion valve is blocked
or stuck, or the expansion valve coil
and cable connections are faulty.
5. The indoor fan is faulty.
6. The ambient temperature is
below the lower threshold.
Comp 2 low 1. The refrigerant leaks.
suction
2. The pressure displayed is
pressure
different from the actual pressure.
alarm
3. The filter dryer is blocked.
4. The expansion valve is blocked
or stuck, or the expansion valve coil
and cable connections are faulty.
5. The indoor fan is faulty.
6. The ambient temperature is
below the lower threshold.
Comp 1 low
1. The refrigerant leaks.
suction
2. The pressure displayed is
pressure
different from the actual pressure.
alarm
3. The filter dryer is blocked.
4. The expansion valve is blocked
or stuck, or the expansion valve coil
and cable connections are faulty.
5. The indoor fan is faulty.
6. The ambient temperature is
below the lower threshold.
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6 System Operation and Maintenance
Solution
refrigerant.
8. Maintain or replace the
exhaust fan.
1. Identify and repair the leaking
point, and refill refrigerant after
maintenance.
2. Calibrate or replace the
pressure sensor.
3. Maintain or replace the filter
dryer.
4. Maintain or replace the
expansion valve or the coil, and
reconnect cables.
5. Maintain or replace the indoor
fan.
6. Measure the ambient
temperature.
1. Identify and repair the leaking
point, and refill refrigerant after
maintenance.
2. Calibrate or replace the
pressure sensor.
3. Maintain or replace the filter
dryer.
4. Maintain or replace the
expansion valve or the coil, and
reconnect cables.
5. Maintain or replace the indoor
fan.
6. Measure the ambient
temperature.
1. Identify and repair the leaking
point, and refill refrigerant after
maintenance.
2. Calibrate or replace the
pressure sensor.
3. Maintain or replace the filter
dryer.
4. Maintain or replace the
expansion valve or the coil, and
reconnect cables.
5. Maintain or replace the indoor
fan.
6. Measure the ambient
150