Huawei NetCol8000-E220 User Manual page 137

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Fault
Type
The fan is
rotating
slowly.
Excessivel
y small
airflow
volume
Vibration
Abnormal
noise
Dangers Caused by Current
●
●
Issue 06 (2020-08-19)
Possible Cause
The fan does not
rotate.
Fan blade friction/
collision
The active
temperature
management
function is enabled
(when the motor or
electronic system is
overheated).
The fan is rotating
slowly.
The air channel is
blocked.
The pressure loss is
different from the
designed value.
Imbalance
Bearing damage or
wear
Fan blade friction/
collision
The fan is operating
in the stall zone
(applicable to an
axial fan)
The concentricity of
the air intake ring is
incorrect (applicable
to a centrifugal fan).
Electrical components can only be operated by professional electricians or
persons familiar with electricity, or under the supervision of an electrician.
Comply with five electrical safety regulations.
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6 System Operation and Maintenance
Solution
Clear foreign matters or dirt in the fan if
necessary.
Check whether the air circulation is normal.
Clear foreign matters if necessary.
The fan blade is blocked or polluted.
Check the air inlet temperature.
Check the installation space (wind speed on
the heat sink).
Check the fan speed.
Check whether the airflow is smooth (air
intake/exhaust valve and air filter).
The fan blade is blocked or polluted.
Check the selected fan.
Check whether the fan blades are
damaged, polluted, or frozen.
Replace the bearing.
Clear the foreign matters or dirt from the
fan.
Check whether the airflow is smooth (air
intake/exhaust valve, and air filter).
Observe the installation precautions.
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