042-288-B0-001, Rev. A2
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4.4 Control Functions ........................................................................................... 59
4.5 Alarm Classications ...................................................................................... 60
4.6 ECM Alarm Overview ..................................................................................... 62
4.7 Connecting the Alarm and Control Connections ............................................ 63
4.8 ECM DIP Switch and Fuse Conguration ...................................................... 64
4.9 ECM Interface Block Diagram and Connectors ............................................. 66
4.10 ECM Self-test ................................................................................................. 67
4.11 Maintenance Functions ................................................................................. 68
5.0 Turn-up and Test ....................................................................................................... 69
5.1 Appearance and Condition of Components ................................................... 69
5.2 System Preparation ....................................................................................... 69
5.3 Performing a Local APU Test ......................................................................... 70
5.4 Generator System Sensor Verication ........................................................... 71
5.4.1 Enclosure Alarm Verication ............................................................... 71
5.4.2 AC and DC Line Sense Verication .................................................... 72
6.0 Operation .................................................................................................................. 73
6.1 Normal Operating Condition .......................................................................... 73
6.1.1 AC Line Fail ......................................................................................... 73
6.1.2 Low DC Bus Level............................................................................... 73
6.2 Alpha Ignition Battery Charger Overview ....................................................... 74
7.0 Maintenance ............................................................................................................. 75
7.1 Servicing the APU .......................................................................................... 76
7.2 Filter Cleaning, CE-3x2 5K-T ......................................................................... 77
7.3 Filter Cleaning, PN-6x-T 7.5kW ..................................................................... 78
7.4 Pad Shear Magnetic Switch Replacement..................................................... 79
7.5 Replacing Gas Hazard Sensor ...................................................................... 80
7.6 Replacing Ignition Battery Charger Module Assembly ................................... 81
7.7 Replacing Engine Control Module ................................................................ 82
7.8 Fuel Conversion, Natural Gas to LP .............................................................. 83
7.8.1 PN-6x-T Pre-regulator Removal with Low Pressure Switch Installation ...... 83
7.8.2 Switching the LP Port to the NG Port, PN-6x-T .................................. 84
7.8.3 Switching the NG Port to the LP Port, CE-3X2 ................................... 85
7.9 Maxitrol Pre-regulator Calibration .................................................................. 86
8.0 Interconnection ......................................................................................................... 89
8.1 Gas Hazard Alarm Interface Connector ......................................................... 89
8.2 Low Fuel Pressure Interface Connector ........................................................ 89
8.3 Gas Solenoid Interface Connector ................................................................ 92
8.4 Charger Module Control Interface Connector ............................................... 90
8.5 ECM Enclosure Alarm Interface Connector ................................................... 91
8.6 Inverter Battery DC Sense Interface Connector ............................................ 91
8.7 Charger Control Interface Connector ............................................................. 92
8.8 ECM AC Line Sense 120/240V Interface ....................................................... 92
8.9 ECM APU Control Interface ........................................................................... 93
8.10 ECM Alarm Interface ...................................................................................... 93
