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 6-33 6.5.41 F5 - OVER CURRENT (Design Iteration 1 & 2 Only) THE HEATER HAS DETECTED THAT THE CURRENT DRAWN FROM THE VEHICLE HAS EXCEEDED THE NORMAL OPERATING LIMIT OF 20 AMPS CHECK/POSSIBLE CAUSE REF. REPAIR 1 WITH HEATER OFF, CHECK FOR FREE ROTATION OF THE VENT IMPELLER BY SPINNING BY HAND 5.2.4 5.2.6 IF IMPELLER DOES NOT ROTATE FREELY, REPLACE VENT FAN IMPELLER AND MOTOR RESTART HEATER 2 DEFECTIVE POWER AND WIRING HARNESSES 5.5.6 REPLACE BOTH LOGIC AND WIRING HARNESSES RESTART HEATER 3 DEFECTIVE ELECTRONIC PROGRAMMED CONTROLLER BOARD 5.2.5 REPLACE ELECTRONIC PROGRAMMED CONTROLLER RESTART HEATER 6.5.42 F5 - OVER CURRENT (Design Iteration 3 Only) THE HEATER HAS DETECTED THAT THE CURRENT DRAWN FROM THE VEHICLE HAS EXCEEDED THE NORMAL OPERATING LIMIT OF 20 AMPS CHECK/POSSIBLE CAUSE REF. REPAIR 1 WITH HEATER OFF, CHECK FOR FREE ROTATION OF THE VENT IMPELLER BY SPINNING BY HAND NOTE: IF ON TEST STAND, BE SURE THAT POWER SUPPLY/ TEST APPARATUS IS NOT CURRENT LIMITING 5.2.4 5.2.6 IF IMPELLER DOES NOT ROTATE FREELY, REPLACE VENT FAN IMPELLER AND MOTOR RESTART HEATER 2 CHECK IGNITER RESISTANCE MEASURE THE RESISTANCE OF THE IGNITER IF LESS TRHAN 1.6 TO 1.8 OHMS REPLACE IGNITER RESTART HEATER 3 DEFECTIVE WIRING HARNESSES REPLACE WIRING HARNESSES RESTART HEATER 4 DEFECTIVE VENT FAN BOARD REPLACE VENT FAN BOARD RESTART HEATER 5 DEFECTIVE POWER BOARD REPLACE POWER BOARD RESTART HEATER 6 DEFECTIVE LOGIC BOARD REPLACE LOGIC BOARD RESTART HEATER