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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 6-24 6.5.32 E6 - HIGH VOLTAGE (Design Iteration 3 Only) VOLTAGE SUPPLIED TO THE HEATER IS ABOVE NORMAL VOLTAGE LIMITS (19VDC - 30VDC NORMAL RANGE) CHECK/POSSIBLE CAUSE REF. REPAIR 1 CHECK THE SOURCE VOLTAGE OR BATTERY LEVELS. VEHICLE TM IF VOLTAGE IS GREATER THAN 30VDC THEN CHECK VEHICLE ALTERNATOR - SEE APPROPRIATE VEHICLE TM TURN HEATER OFF UNTIL VOLTAGE SYSTEM REPAIRED 2 CHECK VOLTAGE AT THE POWER BOARD TO LOGIC BOARD INTERFACE VOLTAGE BETWEEN GROUND (J9-PIN1) AND HOT WIRE (J2-PIN6) SHOULD EQUAL THE VOLTAGE SUPPLIED IF THE VOLTAGE IS HIGH REPLACE THE POWER BOARD RESTART HEATER 3 DEFECTIVE LOGIC BOARD 5.2.5 REPLACE LOGIC BOARD RESTART HEATER NOTE: IF VOLTAGE IS 29.5 – 31 VDC HEATER WILL FLASH AN E6 WARNING AND CONTINUE TO OPERATE. AT VOLTAGES GREATER THAN 31 VDC MEASURED AT THE HEATER, THE HEATER WILL SHUT DOWN WITH AN E6 HARD FAULT.