Hitachi FS3 Series, Service Manual, Page: 168 / 240

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SERVICING
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WARNING: TURN OFF all power source switches
2.10.4 CLEANING WALL TYPE INDOOR UNIT
■ Spread a vinyl sheet over the floor to protect furnitures, etc.
from cleaning water before this work
1. Remove each parts according to the item 2.5. ”Wall Type”.
2. Remove the front panel according to page 2-29 and the
item 2.5.2, ”Removing Front Panel”.
3. Remove the electrical box according to page 2-31 and the
item 2.5.5, ”Removing Electrical Box Cover”.
4. Remove the drain pan according to page 2-32 and the item
2.5.7, ”Removing Drain Pan”.
5. Remove the heat exchanger according to page 2-32 and
the item 2.5.8. ”Removing Heat Exchanger and Fan Motor”.
6. Cleaning
a. Remove dust with a brush.
b. Cover a vinyl sheet over the electrical components to
protect them from splashed cleaning water
c. In the case that cleaning agent is used, clean the heat
exchanger with clean water completely.
d. Adjust the pressure of the pump so as not to damage
fins.
7. Neutralization Treatment after Cleaning
The cleaning agent specified in the item 2.10.1 is of the
neutral type.
However, the cleaning water after use may be not neutral.
Collect all cleaning water and make necessary
neutralization treatment for the cleaning water.
NOTES:
If the cleaning water remains, fins will be corroded.
Adjust the pressure of the pump at 2.5 to 5.0 kg/cm² so as
not to damage fin
2.10.5 CLEANING FLOOR TYPE AND FLOOR
CONCEALED TYPE INDOOR UNIT
■ Spread a vinyl sheet over the floor to protect furnitures, etc.
from cleaning water before this work
1. Remove the front cover according to page 2-36 and the
item, 2.6.4, ”Removing Front Cover”.
2. Disconnect the drain hose from the field-supplied pipe.
3. Cover the rear side of the heat exchanger with a vinyl sheet
after removing front side partition and drain pan. After
covering, remount the front side partition and drain pan.
Pump
Bucket
Heat Exchanger
Cover it with
Vinyl Sheet
Front Side
Partition
Drain Pan