TECHTOP TD350 - Cooling Fan Replacement

TD350 Series VFD Maintenance and hardware fault diagnosis
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Subject
Item
Method
Criterion
Control
circuit
Control PCB,
connector
Check whether the screws
and connectors loose.
Screw them up.
No exception
occurs.
Check whether there is
unusual smell or
discoloration.
Olfactory and visual
inspection
No exception
occurs.
Check whether there are
cracks, damage, deformation,
or rust.
Visual inspection
No exception
occurs.
Check whether there is
electrolyte leakage or
deformation.
Visual inspection,
and determine the
service life based on
the maintenance
information.
No exception
occurs.
Cooling
system
Cooling fan
Check whether there are
unusual sounds or vibration.
Auditory and visual
inspection, and turn
the fan blades with
your hand.
The rotation is
smooth.
Check whether the bolts
loose.
Screw them up.
No exception
occurs.
Check whether there is
decoloration caused due to
overheat.
Visual inspection,
and determine the
service life based on
the maintenance
information.
No exception
occurs.
Ventilation duct
Check whether there are
foreign matters blocking or
attached to the cooling fan, air
inlets, or air outlets.
Visual inspection
No exception
occurs.
For more details about maintenance, contact the local TECHTOP office, or visit the official website.
8.3 Cooling fan
The service life of the cooling fan of the VFD is more than 25,000 hours. The actual service life of the
cooling fan is related to the use of the VFD and the temperature in the ambient environment.
You can view the running duration of the VFD through P07.14 (Accumulated running time).
The increase of the bearing noise indicates a fan fault. If the VFD is applied in a key position, replace
the fan once the fan starts to generate unusual noise. You can purchase spare parts of fans from
TECHTOP.