Huawei NetCol5000-A - Page 142

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
134
Alarm
ID
Alarm
Alarm
Severity
Impact
Possible Cause
Solution
2 T/H brd
comm
failed
is
generated.
sensor are loose or
damaged.
2. The DIP switch of the
T/H sensor is set
incorrectly.
3. The T/H sensor is faulty.
4. The communication port
of the control board is
faulty.
T/H sensor.
2. Set the DIP switch of the
T/H sensor correctly.
3. Maintain or replace the
T/H sensor.
4. Maintain or replace the
control board.
a008
Comp HP
switch
Major
The alarm
is
generated,
and the
compresso
r shuts
down.
1. The outdoor unit input
power has an open phase,
incorrect phase sequence,
or is unavailable.
2. The condenser is blocked.
3. The condenser fins are
blocked.
4. Cables to the high
pressure switch are not
properly connected.
5. The cables to the high
pressure switch are loose
or damaged.
6. The high pressure switch
is faulty.
7. The refrigerant is
overfilled.
1. Check the power supply
of the outdoor unit.
2. Check the cables to
outdoor unit.
3. Clean the condenser fins.
4. Maintain or replace the
outdoor unit or unit
driver.
5. Check the cables to the
high pressure switch.
6. Maintain or replace the
high pressure switch.
7. Decrease certain amount
of refrigerant.
a009
Comp HP
switch
lock
Critical
The alarm
is
generated,
and the
compresso
r shuts
down.
The a008 comp HP switch
alarm is generated
frequently.
Reference to the solutions
for the a008 comp HP switch
alarm.
a012
Comp
discharge
HT
Major
The alarm
is
generated,
and the
compresso
r shuts
down.
1. The refrigerant leaks.
2. The condenser fins are
blocked.
3. The ambient temp is
high.
4. The temperature
displayed is different
from the actual
temperature.
5. The discharge
temperature sensor is
faulty.
6. The outdoor unit input
power has an open phase,
incorrect phase sequence,
1. Check for any leakages.
Fill refrigerant after
maintenance or
replacement.
2. Clean the condenser fins.
3. Measure the ambient
temperature.
4. Calibrate or replace the
exhaust air temperature
sensor.
5. Maintain or replace the
temperature sensor.
6. Check the power supply
of the outdoor unit.
7. Check the cables to