Huawei NetCol8000-A045D User Manual page 258

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Alarm ID Alarm Name
A28D-01 Compressor 1 low
suction pressure alarm
Compressor 2 low
suction pressure alarm
Issue 05 (2020-10-10)
Alarm
Severity
Major
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
● The refrigerant
leaks.
● The solenoid valve
is faulty.
● The pressure
displayed is
different from the
actual pressure.
● The filter dryer is
blocked.
● The expansion
valve is blocked or
stuck, or the
expansion valve coil
and cable
connections are
faulty.
● The indoor fan is
faulty.
● The ambient
temperature is
below the lower
threshold.
10 Alarm Reference
Solution
1. Identify and repair
the leaking point,
and refill
refrigerant after
maintenance.
2. Maintain or replace
the solenoid valve
coil or the solenoid
valve.
3. Calibrate or replace
the pressure sensor.
4. Maintain or replace
the filter dryer.
5. Maintain or replace
the expansion valve
or the coil, and
reconnect cables.
6. Maintain or replace
the indoor fan.
7. Measure the
ambient
temperature.
248