ACV HP300 Manuel De Mise En Service, D'opération Et D'entretien page 19

 Method for set
 Cancel:
EN
Press the TIME ON key, the minute digit of the clock ont he
display starts flashing slowly.
Press „UP" and „DOWN" key, you can adjust the minute.
Press the TIME ON key again, the minute digit stops
flashing, and the hour digit starts.
Press „UP" and „DOWN" key, you can adjust the hour.
Press the TIME ON key again and wait about 10s, flashing
stops and ON TIMER set is finished.
In the unlocked state, press the CANCEL key for 1 second
and the TIME ON function will be cancelled.
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