Hitachi RCI Service Manual page 382

12 Maintenance notes
Tie the rope to the suspension bracket of the indoor unit and drop
downwards.
Insert the support bars into the holes in the cleaning water manifold.
Tie another rope to the support bar of the water manifold and hang
the manifold.
N O T E
The water manifold must be 20 to 30 mm higher than the
bottom of the unit.
Connect a pipe to the boss and place the end inside a bucket.
Pour approximately 15 litres of cleaning product into a supply tank.
Insert the nozzle of the gun into the hole in the cleaning water
manifold.
2
Set the water pump pressure to between 2.5 and 5 kg/cm to
protect the fins.
Start the water pump and clean the heat exchanger of any dust.
C A U T I O N
Dry all drops of water from the indoor unit. Any water
remaining could rust parts of the unit.
370
SMGB0063 rev. 1 - 10/2010