| Table of Contents |    | 
Section 1: Introduction  |    | page 1  | 
1-1System  |    | 1  | 
1-2Models  |    | 1  | 
1-3Purpose  |    | 1  | 
1-4Definitions  |    | 1  | 
1-5How To Use This Manual  | 1  | 
Section 2: Specifications  |    | 1  | 
2-1Enclosure Type  |    | 1  | 
2-2Power Requirements  |    | 1  | 
2-3Input Ratings  |    | 1  | 
2-4Output Ratings  |    | 1  | 
2-5Field Wiring Connections  | 1  | 
2-6Operating Temperature  |    | 1  | 
Section 3: Model Identification  | 1  | 
3-1Model Numbers  |    | 1  | 
3-2 A901  |    | 2  | 
3-3A901-2  |    | 5  | 
3-4 A902  |    | 7  | 
3-5A902-2  |    | 8  | 
3-6 A903  |    | 10  | 
3-7 A903-2  |    | 12  | 
Section 4: Installation  |    | 14  | 
4-1Location  |    | 14  | 
4-2Wiring  |    | 14  | 
4-3Crank Disconnect  |    | 19  | 
4-4Pre-Operational Check-Out  | 19  | 
Section 5: Operation  |    | 21  | 
5-1Operator Controls  |    | 21  | 
5-2Operating Modes  |    | 21  | 
Section 6: Routine Maintenance and Operational Tests  | 21  | 
6-1Routine Maintenance  |    | 21  | 
6-2Operational Tests  |    | 21  | 
Section 7: Troubleshooting and Repair  | 21  | 
7-1Tools Required  |    | 21  | 
7-2A900 SELECTRONIC®  | Control Operation and Shutdown  | 21  | 
7-3A900 SELECTRONIC®  | Control Alarm Circuit Operation  | 23  | 
Section 8: Service Parts  |    | 24  | 
8-1Table 8-1: Replacement Components of the A900 Series Generator Controls  | 24  | 
8-2Table 8-2: Replacement Components of the A900 Controls for Detroit Diesel  | 24  |