Komatsu ecot3 Operation And Maintenance Manual page 124

OPERATION OPERATION
Daylight Saving Time (Summer time)
1) If daylight saving time is turned ON (a), the clock display
becomes 1 hour earlier. If daylight saving time is turned OFF
(b), the clock display returns to the set time.
The selected display mode is highlighted in green.
2) Change the daylight saving time with the switches as follows.
F3: Moves 1 item to left.
F4: Moves 1 item to right.
F5: Cancels change and returns to user menu.
F6: Accepts change and goes to setting for "Time".
If the setting has been changed, always press switch F6.
REMARK
Daylight saving time or summer time means moving the clock
forward 1 hour to take advantage of the fact that the sun rises early
in summer. This system is used in many countries during the
summer.
DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES
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