Huawei NetCol8000-A Series User Manual page 157

NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual
Alarm Alarm
ID Name
a009 Comp HP
lock
a010 Comp LP
a011 Comp LP
lock
Issue 10 (2019-01-15)
Alarm Occurrence
Severit Conditions
y
Critical A compressor
has triggered
six high
pressure
alarms within
one
consecutive
hour, or a
compressor
high pressure
alarm is not
cleared within
10 minutes.
Major The
compressor
low pressure
switch is
disconnected
when the
alarm
detection
delay expires.
Critical A compressor
has triggered
six low
pressure
protections
within one
consecutive
hour, or a
compressor
low pressure
alarm has not
cleared within
Copyright © Huawei Technologies Co., Ltd.
6 System Operation and Maintenance
Possible Causes
The a008 comp HP alarm is
generated frequently.
1. The refrigerant leaks.
2. The solenoid valve is
faulty.
3. Cables to the low pressure
switch are loose or
damaged.
4. The low pressure switch is
faulty.
5. The dryer filter is blocked.
6. The expansion valve is
blocked.
7. The indoor fans are faulty.
The a010 comp LP alarm is
generated frequently.
Solutions
the solenoid valve.
8. Decrease certain
amount of
refrigerant.
Reference to the
solutions for the a008
comp HP alarm.
1. Check for any
leakages. Fill
refrigerant after
maintenance or
replacement.
2. Maintain or replace
the solenoid coil or
solenoid valve.
3. Check cables to the
low pressure switch.
4. Maintain or replace
the low pressure
switch.
5. Maintain or replace
the dryer filter.
6. Maintain or replace
the expansion valve.
7. Maintain or replace
the indoor fans.
Reference to the
solutions for the a010
comp LP alarm.
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