Hitachi RCI Service Manual page 404

12 Maintenance notes
¿ Cleaning the floor console and floor concealed console indoor unit RPF(I)
Remove the front panel in line with the instructions given in chapter
Removal of the front panel, see on page 347.
Remove any dust from the heat exchanger.
Remove the dust from the heat exchanger by brushing it in a
downwards direction. Collect all of the dust in a bucket or a
cardboard box.
Disconnect the drain pipe from the piping.
Cover the rear of the heat exchanger with a sheet of vinyl after
removing the front partition and the drain pan. After covering the
rear, refit the front partition and the drain pan.
Lift the drain pipe and place the end in a bucket.
¿ Cleaning of the ceiling-type indoor unit (RPC)
Preliminary procedure.
Place a vinyl sheet on the floor to protect the furniture from the cleaning water before starting this job.
Remove the side panels in line with the instructions given in chapter
392
SMGB0063 rev. 1 - 10/2010
Removal of the side panel, see on page 316.