Huawei NetCol5000-A User Manual page 148

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Alarm
Alarm
ID
PSU 2
fault
a054 PSU 1
comm
interrupt
PSU 2
comm
interrupt
a055 Discharge
temp
sensor
fault
Discharge
a056
pressure
sensor
fault
a057 Comp
discharge
HP
a058 Comp
discharge
HP lock
a059 Suction
pres
sensor
fault
Issue 01 (2017-07-27)
Alarm
Impact
Severity
generated.
Major The alarm
is
generated.
Major The alarm
is
generated.
The alarm
Major
is
generated.
Major The alarm
is
generated,
and the
compresso
r shuts
down.
Critical The alarm
is
generated,
and the
compresso
r shuts
down.
Major The alarm
is
generated.
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Copyright © Huawei Technologies Co., Ltd.
Possible Cause
1. The communication
cables of the PSU are
faulty.
2. The PSU is faulty.
3. The communication port
of the control board is
faulty.
1. Cables to the exhaust air
temperature sensor are
not properly connected.
2. The discharge
temperature sensor is
faulty.
1. The cables to the press
sensor are loose or
damaged.
2. The press sensor is faulty.
1. The outdoor unit input
power has an open phase,
incorrect phase sequence,
or is unavailable.
2. Signal cables to the
outdoor unit are not
properly connected.
3. The condenser fins are
blocked.
4. The outdoor fan driver or
fan is faulty.
5. The press displayed is
different from the actual
press.
6. The refrigerant is
overfilled.
The a057 comp discharge
HP alarm is generated
frequently.
1. The cables to the press
sensor are loose or
damaged.
2. The press sensor is faulty.
5 Operation and Maintenance
Solution
1. Check the
communication cables of
the PSU.
2. Maintain or replace the
PSU.
3. Maintain or replace the
control board.
1. Check cables to the
exhaust air temperature
sensor.
2. Maintain or replace the
exhaust air temperature
sensor.
1. Check the cables to the
press sensor.
2. Replace the press sensor.
1. Check the power supply
of the outdoor unit.
2. Check the signal cables to
outdoor unit.
3. Clean the condenser fins.
4. Maintain or replace the
outdoor unit or unit
driver.
5. Calibrate or replace the
press sensor.
6. Decrease certain amount
of refrigerant.
Reference to the solutions
for the a057 comp discharge
HP alarm.
1. Check the cables to the
press sensor.
2. Maintain or replace the
press sensor.
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