Huawei NetCol8000-E220 User Manual page 155

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual
Alarm Alarm
ID Severity
A28B- CRITICA
02 L
A28C- MAJOR
01
A28C- CRITICA
01 L
Issue 02 (2019-10-10)
Alarm
Probable Cause
Name
9. The exhaust fan is faulty.
Comp 2 high 1. The refrigerant leaks.
discharge
2. The condenser fins are dirty or
temperature
blocked.
alarm
3. The ambient temperature exceeds
the upper threshold.
4. The temperature displayed by the
exhaust air temperature sensor is
different from the actual
temperature.
5. The exhaust air temperature
sensor is faulty.
6. The input power of the outdoor
unit has an open phase, incorrect
phase sequence, or is unavailable.
7. Cables to the indoor or outdoor
fan are not properly connected.
8. The outdoor fan or its drive is
faulty.
9. The exhaust fan is faulty.
Comp 1 high 1. The input power of the outdoor
discharge unit has an open phase, incorrect
pressure phase sequence, or is unavailable.
alarm
2. Cables to the indoor or outdoor
fan are not properly connected.
3. The condenser fins are dirty or
blocked.
4. The outdoor fan or its drive is
faulty.
5. The pressure displayed is
different from the actual pressure.
6. The refrigerant is overfilled.
7. The exhaust fan is faulty.
Comp 2 high 1. The input power of the outdoor
discharge unit has an open phase, incorrect
pressure phase sequence, or is unavailable.
alarm
2. Cables to the indoor or outdoor
fan are not properly connected.
3. The condenser fins are dirty or
blocked.
4. The outdoor fan or its drive is
faulty.
5. The pressure displayed is
different from the actual pressure.
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Solution
1. Identify and repair the leaking
point, and refill refrigerant after
maintenance.
2. Clean the condenser fins.
3. Measure the ambient
temperature.
4. Calibrate or replace the
temperature sensor.
5. Maintain or replace the
temperature sensor.
6. Check the input power of the
outdoor unit.
7. Check the cables to the indoor
and outdoor fans.
8. Maintain or replace the
outdoor fan or its drive.
9. Maintain or replace the
exhaust fan.
1. Check that the input power is
normal.
2. Check the cables to the indoor
and outdoor fans.
3. Clean the condenser fins.
4. Maintain or replace the
outdoor fan or its drive.
5. Calibrate or replace the
pressure sensor.
6. Decrease certain amount of
refrigerant.
7. Maintain or replace the
exhaust fan.
1. Check that the input power is
normal.
2. Check the cables to the indoor
and outdoor fans.
3. Clean the condenser fins.
4. Maintain or replace the
outdoor fan or its drive.
5. Calibrate or replace the
pressure sensor.
6. Decrease certain amount of
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