Cooling Fan - Hitachi S1 Series Basic Manual

S1 series standard inverter
Subject
Control Control PCB,
circuit connector

Cooling fan

Cooling
system
Ventilation duct
For more details about maintenance, contact the local HITACHI office, or visit our website
http://www.hitachi-industrial.com.
8.3 Cooling fan
The service life of the cooling fan of the inverter is more than 25,000 hours. The actual service life of
the cooling fan is related to the use of the inverter and the temperature in the ambient environment.
You can view the running duration of the inverter through P07.14 (Accumulated running time).
The increase of the bearing noise indicates a fan fault. If the inverter 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 HITACHI.
Item
are in good contact.
Check whether the screws
and connectors loose.
Check whether there is
unusual smell or
discoloration.
Check whether there are
cracks, damage, deformation,
or rust.
Check whether there is
electrolyte leakage or
deformation.
Check whether there are
unusual sounds or vibration.
Check whether the bolts
loose.
Check whether there is
decoloration caused due to
overheat.
Check whether there are
foreign matters blocking or
attached to the cooling fan, air
inlets, or air outlets.
Method
Screw them up.
Olfactory and visual
inspection
Visual inspection
Visual inspection,
and determine the
service life based on
the maintenance
information.
Auditory and visual
inspection, and turn
the fan blades with
your hand.
Screw them up.
Visual inspection,
and determine the
service life based on
the maintenance
information.
Visual inspection
-174-
Criterion
occurs.
No exception
occurs.
No exception
occurs.
No exception
occurs.
No exception
occurs.
The rotation is
smooth.
No exception
occurs.
No exception
occurs.
No exception
occurs.