Hitachi RCI Service Manual page 386

12 Maintenance notes
Work prior to cleaning
Turn off the power supply switches before starting maintenance work and fit the appropriate safety locks and warnings.
Wait 5 minutes after turning off the power supply switches.
Place a vinyl sheet on the floor to protect the furniture and other items from the cleaning water.
Remove the following components:
1 Front panel.
2 Electrical box panel.
3 Drain pan.
4 Heat exchanger and fan motor.
Cleaning the indoor unit
Use a brush to clean away any dust. To do so, brush downwards
and collect all of the dust in a bucket or cardboard box.
Cover the electrical components with a vinyl sheet to protect them
from splashed cleaning water.
Follow the steps below to wash with clean water:
1 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
protect the fins.
3 Start the water pump and wash the fins with clean water.
4 Spray cleaning water over the heat exchanger fins.
C A U T I O N
If you are using a cleaning product, wash the heat exchanger
fully with clean water.
Work and checks after cleaning
1 Remove the vinyl sheets.
2 Fit the following components:
a Heat exchanger and fan motor.
b Drain pan.
c Electrical box panel.
d Front panel.
N O T E
The cleaning product is neutral. However, after it has been used the cleaning water may no longer be neutral.
3 Collect the cleaning water and apply the neutralisation treatment once you have disposed of it.
RPF(I) - Floor type
D A N G E R
Wear gloves to avoid injuries when handling components.
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