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8. PERIODIC MAINTENANCE [Cooler]
8.9 Cleaning of Cooler
If dust sticks on the cooling air side of the cooler,
it deteriorates its heat exchange and results lu-
bricant and air insufficiently cooled.
Clean the cooler in such case.
q
Press the
STOP
button.
w
Turn the POWER OFF.
e
Remove the right enclosure panel.
r
For the 22 kW models (Figure A):
Remove the rear enclosure panel. Remove the
cleaning cover on the rear of the cooler duct.
For the 37 kW models (Figure B):
Remove the cleaning cover on the front of the
cooler duct.
t
Prepare an air blow nozzle with bent end.
Blow the compressed air to the cooler fins to
blow adhered dust or waste off of them.
y
Reassemble the covers to its original place.
If the unit is heavily contaminated, more heavy duty
cleaning such as steam cleaning seems to be required.
Ask your dealer or Hitachi Service Station for informa-
tion.
Air Cleaning Pipe
IMPORTANT
Cleaning Cover
Cleaning Cover
Figure A: Rear View of 22 kW Models
Figure B: Rear View of 37 kW Models
400〜500mm
It is easy to clean if the nose of the pipe
is bent for about 20 to 40 mm from its end.
