Hitachi RAC-18WSA, Instruction Manual, Page: 32 / 308

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No daily maintenance is required. However, filter should be cleaned
if the dirt is noticeable due to the environment in which the air
conditioner is used.
stainless mesh filter
Stop the operation with the remote
controller and unplug the power plug
(or turn off the circuit breaker).
Open the front panel.
(Refer to page 6 on opening the front panel)
Remove the front panel.
Push
Arm
Arm Push the end of the right-side arm outward to
release the tab.
Move the left-side arm outward to release the
left tab, and then pull the panel towards you.
Maintenance of Stainless Mesh Filter
Remove the front stainless mesh filter.
Filter locks
Hold this part to pull it out
Slide the left and right stainless filter locks
towards the direction as illustrated.
Slightly lift up the stainless mesh filter
and pull it out towards you.