ACV HP300 Manuel De Mise En Service, D'opération Et D'entretien page 17

 Method for time set:
EN
Press the CLOCK key, the minute of the the minute
digit of the clock on the display starts flashing slowly.
Press the „UP" and „DOWN" key, you can adjust the
minute.
Press the CLOCK key again, the minute digit stops flashing
while the hour digit starts flashing.
Press the „UP" and „DOWN" key, you can adjust the hour
to set the clock.
Press the „CLOCK" key again and wait about 10 seconds,
flashing stops and CLOCK SET is finished.
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