Hitachi RAS-S18CDT Instruction Manual page 18

MAINTENANCE
CAUTION
Cleaning and maintenance must be carried out when fi lter lamp lights. Before cleaning, stop
operation and switch off the power supply.
1. PRE-FILTER
Clean the pre-fi lter, as it removes dust inside the room. In case the pre-fi lter is full of dust, the air
fl ow will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to
clean the pre-fi lter following the procedure below.
1
Open the front panel and remove the pre-fi lter
Gently lift and remove the air purifying fi lter
●
from the pre-fi lter frame.
2
Vacuum dust from the pre-fi lter and air purifying
fi lter using vacuum cleaner. If there is too much
dust, rinse pre-fi lter under running tap water
and gently brush it with soft bristle brush. Allow
fi lters to dry in shade.
3
Re-insert the air purifying fi lter to the fi lter
●
frame. Set the pre-fi lter with "FRONT" mark
facing front, and slot them into the original
state.
After attaching the pre-fi lters, push the front
●
panel at three arrow portions as shown in
fi gure and close it.
NOTE:
Air purifying fi lter should be cleaned every month or sooner if noticeable loading occurs. When
●
used overtime, it may loose its deodorizing function. For maximum performance, it is recommended
to replace it every 1 year depending on application requirements.
CAUTION
Do not wash with hot water at more than 40°C. The Pre-fi lter may shrink.
●
When washing it, shake off moisture completely and dry it in the shade; do not expose it directly
●
to the sun. The Pre-fi lter may shrink.
Do not use detergent on the Pre-fi lter as some detergent may deteriorate the Pre-fi lter electrostatic
●
performance.
● Do not operate the air conditioner without Pre-fi lter. Dust may enter the air conditioner and fault
may occur.
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