Hitachi RAK-18PSA Mode D'emploi page 19

CLEAN ( ONE TOUCH CLEAN) OPERATION
Drying indoor heat exchanger after cooling operation to prevent mildew.
When CLEAN operation finish, unit will switch OFF automatically.
If Daily Timer or Once Timer is set, there is a need to cancel those timer before operating CLEAN function.
Press
Total time taken for One Touch Clean operation is 60 minutes.

During this operation, HEATING or FAN operation shall
operate.
During one touch clean, operation lamp is blinking.
Press (STOP) button. Or
STOP STOP STOP
Press
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(CLEAN) button when unit is OFF.
(CLEAN) button again.