Hitachi RCI Service Manual page 400

12 Maintenance notes
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.
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.
1 After cleaning, fit the drain pan by lowering the rope.
2 Dry the remains of any water on the indoor unit.
3 Check the insulation of the drain pump using a megohmmeter.
Check that the insulation is above 1 MΩ when 500V are
applied.
4 Connect the wiring.
5 Perform the neutralisation treatment after cleaning.
¿ Cleaning the built-in 2-way indoor unit (RCD)
Preliminary procedure.
Place a vinyl sheet on the floor to protect the furniture and other items from the cleaning water before starting this job.
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SMGB0063 rev. 1 - 10/2010
3
to protect the