Hitachi RAS-70YH7 Service Manual page 26

MAINTENANCE
!
Cleaning and maintenance must be carried out only by qualifi ed service personnel.
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 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, pre-fi lter only rinse under running tap water
and gently brush it with soft bristle brush. Allow
pre-fi lters to dry in shade.
3
Re-insert the air purifying fi lter to the pre-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 air purifying fi lter as some detergent may deteriorate the fi lter electrostatic
●
performance.
CAUTION
– 25 –