Hitachi NEXT Series Instruction Manual page 107

Cleaning of Controller and Fan Inverter Cooling Fin
18
(The fan inverters are provided only with
Water-Cooled
Duct
16 to 20 inches
(400 to 500) mm
Air blow nozzle
Bend the nozzle at 0.8 to 1.8 inches
(20 to 40 mm) from the end to
facilitate cleaning.
Fin cover (1)
Water-Cooled Duct
9. MAINTENANCE [How to Service the Air Compressor]
Air-Cooled
Fin cover (2)
Air-Cooled
Fan
Controller
inverter
cooling fin
cooling fin
.)
If dust adheres to the cooling fin of the controller and fan
inverter, cooling performance is decreased. Also, it may
cause shorten the life of smoothing capacitor and power
devices, and may cause components failures.
● For normal dirt of cooling fin
① Turn off the power and wait approximately 10
minutes. Then remove the front door.
② S ince fin cover and cooling fin are very hot soon after
the air compressor is stopped, wait until they are
cooled down properly before starting the work.
Remove the fin cover (2) as shown in the figure.
③ C heck the controller cooling fin for dust and dirt.
Blow off the cooling fin by dry air using an air blow
nozzle with a bent end.
④ Install the covers to their original locations.
● For heavy dirt of cooling fin
① T urn off the power and remove the front door [Ref.
No. 904] and the right cover [Ref. No. 908]. Then
remove the duct which is equipped only for water-
cooled for control panel. Then remove the motor duct
[Air-Cooled Ref. No. 975, Water-Cooled Ref. No.
975 - 978].
② S ince fin cover and duct behind the control panel are
very hot soon after the air compressor is stopped,
wait until they are cooled down properly before
starting the work. Remove fin cover (1) and the duct
behind the control panel as shown in the figure.
③ C heck the cooling fins of controller and cooling fan
inverter for dust and dirt. Blow off the cooling fin by
dry air using an air blow nozzle with a bent end.
④ I nstall the covers to their original locations.
(Note) does not come with the board duct.
Air-Cooled
105