Huawei NetCol8000-E220 User Manual page 136

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Table 6-5 Fan troubleshooting
Fault
Type
Fan not
rotating
Issue 06 (2020-08-19)
Possible Cause
Check whether the
power supply voltage
meets the
requirements.
Open phase
The voltage is less
than the lower
threshold or greater
than the upper
threshold.
A short circuit exists
between the fan and
the ground.
The coil is short-
circuited or the
motor is burnt.
The overtemperature
protection function
of the motor is
triggered (the motor
is overheated).
The fan blade is
blocked or dirty.
The temperature is
too low for the
lubricating grease of
the bearing.
The airflow direction
is incorrect (the
direction of the
motor is opposite to
that of the high-
speed airflow).
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6 System Operation and Maintenance
Solution
Check the power supply voltage.
Check the power cable and voltage of the
motor.
Replace the fan. If there is a beam for
hoisting the fan in the air exhaust section,
before removing the fan, use a hook to
hook the fan to the beam to prevent the
fan from falling.
Check whether the air circulation is normal.
Clear foreign matters if necessary.
The fan blade is blocked or dirty.
Check the air inlet temperature.
Check the voltage.
Power off the motor and prevent it from
being connected again.
● Check whether the motor is powered off.
● Remove the protective grille.
● Clear foreign matters or contaminants.
● Reinstall the protective grille.
Install the bearing with low-temperature
lubricating grease.
Check the airflow direction (rotation caused
by airflow reversal).
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