. OPERATION DETAILED CONTROLS AND GAUGES Basic Operation of Machine Monitor If There Is Abnormality When Starting Engine 3 - 6 If aintenance in terval warning screen CC, warning scree n FF, or error screen A fter displayin g the check before the terval warnin A fter displayin g the maintenance i nterval w arning scree n CC for 30 seconds, the screen returns to the standard creen BB. A fter displayin g the check before starting screen DD for F or error scr the screen changes to the warning screen