Hitachi RCI Service Manual page 405

12 Maintenance notes
Remove the louver in line with the instructions given in chapter
Open the air inlet grille as indicated in chapter
Remove the lower panel and drain pan in line with the instructions given in chapter
liquid and gas pipes, see on page 319.
Remove the partition plate after removing the set screws.
Remove the fan securing cover after removing the two screws
located on the left and right of the partition.
Fit the drain pan and the lower panel in the opposite order of the
instructions.
Cleaning the indoor unit
N O T E
Wear gloves to avoid injuries caused by the heat exchanger fins.
Place a vinyl sheet around the electrical components except the
drain pan to protect them from splashed cleaning water.
Secure the motor panel using adhesive tape.
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.
Hang the cleaning water manifold from the indoor unit.
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
the fins.
After cleaning, fit the drain pan by lowering the rope.
Dry the remains of any water on the indoor unit.
393
SMGB0063 rev. 1 - 10/2010
Removal of the air outlet
Removal of the air filter, see on page 316.
grille, see on page 317.
Removal of the thermistors from the
3
to protect
12