Hitachi RCI-1.0FSN3 Service Manual page 420

12 Maintenance notes
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.
Pour approximately 15 litres of cleaning product for the aluminium
fins into a supply tank.
Insert the nozzle of the pressurised water gun into the hole in the
cleaning water manifold. Start the water pump and clean the heat
exchanger of any dust.
After cleaning, spray and remove all remains of water.
N O T E
1 Set the pressure of the water pump so as not to damage
the funs.
2 Any cleaning water left behind will rust the fins. Set the
pump pressure to between 2.5 and 5 kg/cm
fins.
After cleaning, fit the drain pan by lowering the rope.
Dry the remains of any water on the indoor unit.
Check the insulation of the drain pump using a megohmmeter. Check that the insulation is above 1 MΩ when 500V are
applied.
Connect the wiring.
Perform the neutralisation treatment after cleaning.
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Cleaning of the wall-type indoor unit (RPK)
Preliminary procedure.
Place a vinyl sheet on the floor to protect the furniture and other items from the cleaning water before starting this job.
Remove each part as indicated in the "Wall type" section.
Remove the front panel as indicated in section Removal of the front panel.
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 electrical box panel.
Remove the drain pan. Also carry out the following tasks:
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 inser-
ting a pencil into it.
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SMGB0077 rev.0 - 01/2013
to protect the
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