9 Maintenance notes
Indoor cleaning
SMGB0137 rev.0 - 05/2021
298
RPI - Ducted indoor unit type
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D A N G E R
Wear gloves to avoid injuries when handling components.
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 Side panel.
2 Discharge air grille.
3
Air filter.
4 Liquid and gas piping thermistors.
5
Fan motor.
Remove the set screws from the partition plate 2 and remove the plate.
Remove the set screws from the fan cover, located on the left and right of the partition. Then remove the fan cover.
Fit the drain pan and the lower panel.
Cover the components (except the drain pan) with a vinyl sheet to avoid splashing with cleaning water.
Use a brush to clean any dust from the interior surface of the heat exchanger and the fins. To do so, brush downwards
and collect all of the dust in a bucket or cardboard box.
Spray cleaning water over the fins from the rear of the heat exchanger.
Follow the steps below to wash with clean water:
1 Set the water pump pressure to between 2.5 and 5 kg/cm
2
to protect the fins.
2
Start the water pump and wash the fins with clean water.
Work and checks after cleaning
1
Measure the drainage pump insulation using a megohmmeter, check that the insulation is over a 1 MΩ on applying
500 V.
2
Pour water into the drain pan to check that the water flows easily.
3 Remove the vinyl sheets.
4
Fit the fan cover and fit and tighten the cover securing screws.
5
Fit the partition plate and fit and tighten the plate securing screws.
6
Fit the following components:
a.
Fan motor.
b. Liquid and gas piping thermistors.
c.
Air filter.
d. Discharge air grille.
e. Side panel.
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N O T E
The cleaning product is neutral. However, after it has been used the cleaning water may no longer be neutral.
7 Collect the cleaning water and apply the neutralisation treatment once you have disposed of it.
