Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Installation and Operation Manual - Manual (Page 66)

66 745-020-B0-003, Rev. C
7.0 Maintenance, continued
7.6 Replacing Engine Control Module
1. Set RAS to STOP.
2. Turn off 200A DC circuit breaker.
3. Disconnect wire harnesses on ECM top to bottom.
4. Release the ECM captive latch and slide the ECM out of its housing.
5. Check new ECM DIP switch confi guration per Table 4.4 on page 48.
6. Verify 120V/240V jumpers in the 120V position.
7. Install new ECM card. Verify card edges are in rails and latch card in place.
8. Verify RAS is OFF.
9. Reconnect wire harnesses top to bottom.
10. Set RAS to ON.
11. Verify APU runs for the one minute self-test.
12. Check and clear any alarms.
Release ECM captive latch
and slide ECM from its
housing. Perform steps in
reverse order to replace
ECM.
Fig. 7-5, ECM with Connectors Attached