AUXILIARY POWER UNIT FAILS TO CRANK (cont)

AUXILIARY POWER UNIT FAILS TO CRANK - TM-9-2350-292-20-1_79

AUXILIARY POWER UNIT FAILS TO CRANK (cont) - TM-9-2350-292-20-1_81

TM-9-2350-292-20-1 Carrier Ammunition Tracked M992A1(NSN 2360-01-362-3021) EIC:AE6 Manual
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TM 9--2350--292--20--1 0009 00--2 AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED 0009 00 Is 24 V dc present? 1. Remove forward air intake grilles (TM 9--2350--292--10). 2. Disconnect harness 3W711 P1 at APU engine disconnect. 3. Turn MASTER switch ON (TM 9--2350--292--10). 4. Place multimeter red lead on harness 3W702 J1 socket A and black lead to ground. Check for voltage. 5. Turn MASTER switch OFF (TM 9--2350--292--10). no yes C Is 24 V dc present? 1. Reconnect harness 3W711 P1. 2. Remove APU preheater relay/fuel solenoid access cover. 3. Disconnect lead N at preheater relay. 4. Turn MASTER switch ON (TM 9--2350--292--10). 5. Place multimeter red lead in lead N connector and black lead to ground. Check for voltage. 6. Turn MASTER switch OFF (TM 9--2350--292--10). D Repair (WP 0290 00) or replace (WP 0311 00 ) harness 3W702. Verify fault is corrected. no yes Repair (WP 0290 00) or replace (WP 0648 00) harness 3W711. Verify fault is corrected. Is 24 V dc present? 1. Remove APU preheater relay/fuel solenoid access cover. 2. Disconnect lead P from preheater relay. 3. Turn MASTER switch ON (TM 9--2350--292--10). 4. Place multimeter red lead in lead P connector and black lead to ground. Check for voltage. 5. Turn MASTER switch OFF (TM 9--2350--292--10). 6. Reconnect lead P to preheater relay. E CONTINUED ON NEXT PAGE CONTINUED FROM STEP B no yes Repair or replace lead P (WP 0655 00). Verify fault is corrected. Go to step F. CONTINUED FROM STEP B Go to step U.

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