Huawei NetCol5000-A User Manual page 156

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Alarm
Alarm
ID
Outdoor
a143
fan
communic
ation
failure
a144 Outdoor
fan run
overtime
Outdoor
a145
fan Dr
hardware
protect
a146 Outdoor
fan
blocked
a147 Outdoor
fan Dr OP
open
phase
a148 R/W fail
of outdoor
fan Dr
Outdoor
a149
fan Dr
12V
undervolt
a150 Outdoor
fan grid
overvolt
Grid
a151
undervolt
or phase
Issue 01 (2017-07-27)
Alarm
Impact
Severity
and the
compresso
r shuts
down.
The alarm
Major
is
generated.
Warning The alarm
is
generated.
The alarm
Major
is
generated.
Major The alarm
is
generated.
Major The alarm
is
generated.
Critical The alarm
is
generated.
The alarm
Major
is
generated.
Major The alarm
is
generated.
The alarm
Major
is
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
sensor is faulty.
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.
The outdoor fan running
time exceeds the upper limit.
1. The driver output cable is
short-circuited or
grounded.
2. The fan is faulty.
3. The power grid voltage
exceeds the upper
threshold.
The fan is blocked.
1. A driver output cable
connector or fan input
cable connector is loose.
2. A cable is not properly
connected.
EEPROM read/write fails.
The auxiliary power supply
is faulty.
The power grid voltage
exceeds the upper threshold.
The power grid has an open
phase, or its voltage is below
5 Operation and Maintenance
Solution
2. Verify that the suction
temperature sensor works
properly.
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.
Replace the outdoor fan, and
clear the accumulated
running time.
1. Replace the driver output
cable.
2. Replace the fan.
3. Power off and verify that
the input power supply
voltage meets the
specifications.
Clean the fan and remove
obstacles to ensure that the
fan works properly.
1. Secure the driver output
cable.
2. Replace the driver output
cable.
Power off the driver and
power it on 10s later.
Replace it if the alarm
persists.
Replace the fan driver.
Power off the driver and
verify that the supply voltage
meets specifications.
Secure the power grid input
cable, power off the driver,
and verify that the supply
148