Huawei NetCol8000-E220 User Manual page 191

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Alar
m ID
A28B
-01
Issue 06 (2020-08-19)
Alarm Alarm Name
Severit
y
CRITICA Comp 1 high
L discharge
temperature
alarm
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Probable Cause
1. The refrigerant
leaks.
2. The condenser
fins are dirty or
blocked.
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.
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.
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