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 6-30 DURING RUN OPERATIONS THE BURNER TEMPERATURE DROPS BELOW NORMAL OPERATING LIMITS;- FLAME OUT DURNIG HIGH TO LOW OR - XT BELOW FLAMEOUT THRESHOLD OR - BT BELOW FLAMEOUT THRESHOLD OR - XT DROPPED MORE THAN 40C IN 8 SECONDS CHECK/POSSIBLE CAUSE REF. REPAIR 12 CHECK WIRE HARNESS FOR CONTINUITY AND SHORTS CHECK 2 WIRES FROM THE VENT FAN BOARD TO THE LOGIC BOARD FOR CONTINUITY AND SHORT TO GROUND: P11-PIN12 TO P1-PIN3 P11-PIN4 TO P1-PIN12 CHECK FOR MV SIGNAL BETWEEN P11-PIN13 AND P11-PIN5 FOR BT SENSOR P11-PIN14 AND P11-PI N 6 FOR XT SENSOR CHECK FOR OPEN LINE BETWEEN P11-PIN13 TO CHASIS GROUND AND P11-PIN14 TO CHASIS GROUND IF ANY CHECK FAILS REPLACE WIRE HARNESS RESTART HEATER 13 DEFECTIVE LOGIC BOARD REPLACE LOGIC BOARD RESTART HEATER 6.5.37 F3 - HEAT LIMIT (Design Iteration 1 & 2 Only) VENT AIR OUTLET TEMPERATURE HAS EXCEEDED THE UPPER TEMPERATURE LIMITS OF 340°F (171°C) AND HEAT OUTPUT WILL BE REDUCED CHECK/POSSIBLE CAUSE REF. REPAIR 1 CHECK THAT ALL DAMPERS IN VEHICLE ARE OPEN OPEN ALL DAMPERS FULLY SWITCH HEATER TO LOW MODE 2 CHECK FOR OBSTRUCTIONS IN FRONT OF HEATER VENTILATION OUTLET REMOVE OBSTRUCTIONS SWITCH HEATER TO LOW MODE 3 CHECK ALL DUCTING CONNECTIONS VEHICLE TM 2.2 2.3 2.7 INSTALL DUCTING CORRECTLY SWITCH HEATER TO LOW MODE 4 DEFECTIVE HEAT EXCHANGER 5.4.1 REPLACE HEAT EXCHANGER RESTART HEATER