Hitachi FSG1 Series Technical Catalogue page 418

MAINTENANCE
19
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Step 2
Hold the tag of the air filter and pull it, to take out the air
filter.
n
Floor Concealed Type
The indication, "FILTER" is shown on the display of the
remote control switch after approximately 1200 hour
operation. Take out the air filter according to the following
steps.
Step 1
Make a condition to see the front side of the unit.
The air filter is located at the air inlet in the bottom part of
the unit.
Step 2
Pull the tag of the air filter downwards.
And take out the air filter as shown below.
Tag
Air Filter
Tag
Air Filter
n
Ceiling Type
The indication, "FILTER" is shown on the display of the
remote control switch after approximately 100 hour
operation. Take out the air filter according to the following
steps.
Step 1
Side the knobs.
Knob
Step 2
Open the air inlet grille. Take out the air filter from the air
inlet grille.
19.2.2 CLEAN THE FILTER
Clean the air filter according to the following steps.
Step 1
Use a vacuum cleaner or let water flow onto the air filter
for removing the dirt from the air filter.

CAUTION:
Do not use hot water higher than approximately 40 °C.
Step 2
Dry the air filter in the shade after shaking off moisture.
19.2.3 RESET OF FILTER INDICATION
After cleaning the air filter, press the "RESET" button. The
FILTER indication will disappear and the next filter cleaning
time is set.