The controller can count down the time between scheduled maintenance events. Once maintenance is required, the controller will alert the operator via the LCD screen and show "Service Required." On AURORA Generators, the countdown timer is used to remind you that an oil change is required. By default, it is set to 200 hours. (Perkins engines can run up to 500 hours between oil changes under ideal conditions) NOTE: The maintenance timer displays "Service Required" when this time expires. This message is only displayed the next time the controller enters the RUN mode. If the timer expires when the controller is in the RUN mode the message is not displayed. The following settings are used to configure the maintenance count down timer (Timers > Maintenance) To determine the amount of time until the next scheduled maintenance, follow these menu steps: Main Menu -> Device Info. -> Maintenance Maintenance counter is disabled if '----' is displayed. A negative number indicates the amount of time since maintenance timer expired.