Hitachi FS3 Series, Service Manual

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2
52
SERVICING
$
WARNING: TURN OFF all power source switches
7. Check the insulation of the drain pump with a megohm-
meter. Check to ensure that the insulation is grater than
1 M
W
when 500V is applied.
8. Connect wiring as it was.
9. 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.
2.10.3 CLEANING 2-WAY CASSETTE TYPE INDOOR
UNIT
■ Spread a vinyl sheet over the floor to protect furnitures, etc.
from cleaning water before this work
1. Remove the drain pan according to page 2-26 and the
item, 2.4.11, ”Removing Drain Pan”. Clean the drain pan
after removal.
2. Remove the Float Switch according to page 2-26 and the
item, 2.4.9, "Removing Float switch"
3. Remove Drain-Up Mechanism according to page 2-26 and
the item, 2.4.10, "Removing Drain-Up Mechanism"
4. Removing Dust on Heat Exchanger
Remove dust on the fins at the inlet side of the heat
exchanger by scratching off downwards.
Collect all dust in a bucket or carton box.
5. Put a vinyl sheet around the heat exchanger so that
cleaning water will not be splashed over the insulation
surface and drain-up pump. Fix the vinyl sheet on the side
plate of the heat exchanger by using tape with adhesive.
Seal the gap between vinyl sheets using tape with
adhesive.
NOTE:
It is recommended that gloves be used during this work to
avoid any injury.
Put a vinyl sheet to avoid splashed cleaning water.
Fixing
Plate for
Fan
Motor Cover
Water Collector
Before attaching the
water collector to the
heat exchanger, take
the following work.
Put a vinyl sheet here
to protect insulation
sheet from the
splashed cleaning
water.