NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
a145 handling methods.
2. Cut off the three-phase
power supply and check
whether the driver output
cable is faulty. See the
a145 handling methods.
3. Replace the fan.
Outdoor
fan Dr.
sampling
drift
The sampling circuit is
faulty.
Outdoor
fan Dr OP
ground
fault
The driver output cable is
short-circuited or grounded.
Cut off the three-phase
power supply and check
whether the driver output
cable is faulty or grounded.
Outdoor
fan output
current
Imba
The fan three-phase loads are
imbalanced.
Check whether the fan is
faulty.
Outdoor
fan pres
sensor
fault
1. A cable of the pressure
sensor is loose.
2. The pressure sensor is
faulty.
1. Secure the pressure
sensor terminals.
2. Replace the press sensor.
1. The fan overtemperature
feedback cable is loose.
2. The outdoor unit is dirty
and blocked.
3. The fan is faulty.
1. Secure the cable
connected to the fan
overtemperature feedback
terminal.
2. Clean the fan and remove
obstacles to ensure that
the fan works properly.
3. Replace the fan.
Outdoor
fan Dr
Elec
control
box HT
Honeycomb holes in the
driver rear panel are dirty or
blocked.
Clean the honeycomb holes
using a brush.
Outdoor
fan power
freq error
The power grid freq is
abnormal.
Power off the driver and
verify that the supply freq
meets specifications.
The alarm
is
generated,
and the
compresso
r shuts
down.
The fan driver has generated
a major alarm.
Clear the major alarm for the
driver.
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