Alpha Technologies ECM - Manual (Page 16)

16
TM 744-862-C0-003 Rev.C
Engine Control Module (ECM)
Engine Control Module
(ECM) PCB
G R I
(Power Board)
Engine Control Module LED Indicators and switches:
1. Communications Input (J4) Note: Pin #1 at bottom of connector.
2. "Major" Alarm Indicator (Red LED)
3. "Minor" Alarm Indicator (Red LED)
4. "Notify" Indicator (Amber LED)
5. "Comm" Indicator (Green LED)
6. "System" Indicator (Green LED)
7. "Run-Auto-Stop" switch
8. "Service/Reset" Push button switch (SW3)
9. Transponder Interface (J6) Note: Pin #1 at bottom of connector.
GRI Power Board Connectors:
10. Enclosure Alarm Input connector (J10)
11. Fuel Enclosure Alarm connector (J5)
12. Interface Input connector from APU (J4)
13. Inverter battery string connector (J8)
14. Battery Charger Control Interface (J9) - (5.0kW APU only)
15. AC generator Voltage, Current connector (J7)
16. AC Line Input connector (J6) - Connected at all times
1.1 Introduction, continued
8
1
3
5
7
9
10
11
12
13
14
15
J 3
J 3
J 2
J 2
J 1
J 1
2
4
6
15
16
Fig.1-4 Open view, ECM Printed circuit boards