Huawei NetCol5000-A - Page 156

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.
148
Alarm
ID
Alarm
Alarm
Severity
Impact
Possible Cause
Solution
and the
compresso
r shuts
down.
sensor is faulty.
2. Verify that the suction
temperature sensor works
properly.
a143
Outdoor
fan
communic
ation
failure
Major
The alarm
is
generated.
1. The indoor and outdoor
communications cable is
not properly connected.
2. The outdoor fan driver is
faulty.
3. The outdoor unit is not
powered on.
4. The communication port
of the control board is
faulty.
1. Check the indoor and
outdoor communications
cable.
2. Maintain or replace the
outdoor fan driver.
3. Power on the outdoor
unit.
4. Maintain or replace the
control board.
a144
Outdoor
fan run
overtime
Warning
The alarm
is
generated.
The outdoor fan running
time exceeds the upper limit.
Replace the outdoor fan, and
clear the accumulated
running time.
a145
Outdoor
fan Dr
hardware
protect
Major
The alarm
is
generated.
1. The driver output cable is
short-circuited or
grounded.
2. The fan is faulty.
3. The power grid voltage
exceeds the upper
threshold.
1. Replace the driver output
cable.
2. Replace the fan.
3. Power off and verify that
the input power supply
voltage meets the
specifications.
a146
Outdoor
fan
blocked
Major
The alarm
is
generated.
The fan is blocked.
Clean the fan and remove
obstacles to ensure that the
fan works properly.
a147
Outdoor
fan Dr OP
open
phase
Major
The alarm
is
generated.
1. A driver output cable
connector or fan input
cable connector is loose.
2. A cable is not properly
connected.
1. Secure the driver output
cable.
2. Replace the driver output
cable.
a148
R/W fail
of outdoor
fan Dr
Critical
The alarm
is
generated.
EEPROM read/write fails.
Power off the driver and
power it on 10s later.
Replace it if the alarm
persists.
a149
Outdoor
fan Dr
12V
undervolt
Major
The alarm
is
generated.
The auxiliary power supply
is faulty.
Replace the fan driver.
a150
Outdoor
fan grid
overvolt
Major
The alarm
is
generated.
The power grid voltage
exceeds the upper threshold.
Power off the driver and
verify that the supply voltage
meets specifications.
a151
Grid
undervolt
or phase
Major
The alarm
is
The power grid has an open
phase, or its voltage is below
Secure the power grid input
cable, power off the driver,
and verify that the supply