Hitachi RCI Service Manual page 401

12 Maintenance notes
Remove the drain pan as indicated in section
1 Remove the drain pan after emptying it of water.
2 Empty the drain pan of water by removing the rubber plug. Make sure the water flows easily through the hole by inserting
a pencil into it.
3 Once the drain pan has been removed, check that there is no water in the drainage at the bottom of the pan.
4 Clean and dry the pan before removing it. Handle the pan carefully.
Remove the electrical box after opening the corresponding panel and then disconnect the connectors located between the
indoor and outdoor units and other connectors, as indicated in section
Remove the float switch as indicated in
Remove the drainage mechanism as indicated in section
Cleaning the indoor unit
Clean the dust from the inner surface of the heat exchanger by
brushing it downwards. Collect all of the dust in a bucket or a
cardboard box.
N O T E
Wear gloves to avoid injuries caused by the heat exchanger
fins.
Place a vinyl sheet around the heat exchanger to prevent the
cleaning water from splashing the insulation surface and drain
pump. Secure the vinyl sheet to the side plate of the exchanger
using adhesive tape and seal the gap between the vinyl sheets in
the same manner.
Secure the motor panel using adhesive tape.
Hang the cleaning water manifold from the indoor unit.
1 Tie the rope to the suspension bolts of the indoor unit and drop
downwards.
2 Insert the support bars into the holes in the water manifold.
3 Tie the rope to the support bar of the water manifold and hang
the manifold.
4 Connect a pipe to the boss and place the end inside the pipe.
389
SMGB0063 rev. 1 - 10/2010
Removal of the drain pan, see on page 291. Also carry out the following tasks:
sectionRemoval of the float switch, see on page 290.
Removal of the drain
Removal of the electrical box, see on page 287.
mechanism, see on page 290.
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