TM-9-2540-207-14&P Sustainment Manual for A20 Heater for M113 2540-01-396-2826 Download
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TM 9-2540-207-14&P 6-9 2 CHECK SHORTS AND CONTINUITY OF BURNER CABLE ASSEMBLY CHECK 8 WIRES FROM PLUG J4 TO PLUG P1 FOR CONTINUITY J4-PIN1 TO P1-PIN6 J4-PIN2 TO P1-PIN8 J4-PIN3 TO P1-PIN7 J4-PIN4 TO P1-PIN1 J4-PIN5 TO P1-PIN2 J4-PIN6 TO P1-PIN3 J4-PIN7 TO P1-PIN4 J4-PIN8 TO P1-PIN5 ALSO CHECK FOR SHORTS BETWEEN WIRES IF ANY CHECK FAILS REPLACE BURNER CABLE ASSEMBLY RESTART HEATER 3 CHECK IMPELLOR FOR OBSTRUCTION OR DAMAGE REMOVE OBSTRUCTION IF DAMAGED REPLACE IMPELLOR RESTART HEATER 4 CHECK BURNER FAN MOTOR SHAFT FOR FREE ROTATION IF MOTOR DOESN’T ROTATE FREELY REPLACE BURNER FAN MOTOR RESTART HEATER 3 DEFECTIVE POWER BOARD REPLACE POWER BOARD RESTART HEATER 4 DEFECTIVE LOGIC BOARD REPLACE LOGIC BOARD RESTART HEATER 6.5.9 C5 - BURNER SENSOR FAULT (Design Iteration 1 & 2 Only) BURNER SENSOR SIGNAL IS OUTSIDE NORMAL LIMITS CHECK/POSSIBLE CAUSE REF. REPAIR 1 DEFECTIVE WIRING HARNESS 5.5.6 REPLACE WIRING HARNESS RESTART HEATER 2 DEFECTIVE ELECTRONIC PROGRAMMED CONTROLLER BOARD 5.2.5 REPLACE PROGRAMMED CONTROLLER BOARD RESTART HEATER 6.5.10 C5 - BURNER SENSOR FAULT (Design Iteration 3 Only) BURNER TEMPERATURE OR EXHAUST TEMPERATURE SENSOR SIGNAL IS OUTSIDE NORMAL LIMITS; BT SENSOR SHORT OR C5- XT SENSOR SHORT OR C5 - BT SENSOR OPEN OR C5- XT SENSOR OPEN CHECK/POSSIBLE CAUSE REF. REPAIR 1 CHECK BOTH CHASSIS AND VENT FAN BOARD GROUND WIRES FOR PROPER CONNECTION RETIGHTEN CONNECTIONS RESTART HEATER 2 CHECK FOR DAMAGED WIRES FROM THERMOCOUPLE TO THE P11 WIRE HARNESS PLUG IF WIRES ARE DAMAGED REPLACE WIRE HARNESS RESTART HEATER 3 CHECK FOR LOOSE CONNECTIONS BETWEEN THE VENT FAN BOARD AND THE LOGIC BOARD RECONNECT THE P11 PLUG INTO THE VENT FAN BOARD AND THE P1 PLUG INTO THE LOGIC BOARD RESTART HEATER