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 6-7 6.5.5 C3 - VENT FAN FAULT (Design Iteration 1 & 2 Only) VENT IMPELLER SPEED IS BELOW NORMAL LIMITS CHECK/POSSIBLE CAUSE REF. REPAIR 1 WITH HEATER OFF, CHECK FOR FREE ROTATION OF THE VENT IMPELLER BY SPINNING BY HAND 5.2.6 5.2.4 IF VENT IMPELLER DOES NOT ROTATE FREELY, AND AMBIENT TEMPERATURE IS GREATER THAN 32°F (0°C), REPLACE VENT FAN MOTOR AND IMPELLER RESTART HEATER IF THE AMBIENT TEMPERATURE IS BELOW 32°F (0°C), CHECK FOR AND REMOVE FROST OR OTHER OBSTRUCTIONS AROUND THE VENT IMPELLER RESTART HEATER 2 CHECK WIRE CONNECTOR FROM THE VENT FAN MOTOR TO THE ELECTRONIC VENT FAN DRIVER BOARD 5.2.5 RECONNECT TO THE ELECTRONIC VENT FAN DRIVER BOARD RESTART HEATER 3 CHECK WIRE CONNECTOR FROM THE ELECTRONIC VENT FAN DRIVER BOARD TO WIRING HARNESS 5.2.5 5.5.6 RECONNECT TO WIRING HARNESS RESTART HEATER 4 CHECK ALL WIRING CONNECTIONS TO ELECTRONIC BOARDS INCLUDING THE TWO CONTROLLER BOARDS (2 CONNECTORS) 5.2.5 RECONNECT ALL WIRING TO CORRECT ELECTRONIC BOARDS OR COMPONENTS RESTART HEATER 5 DEFECTIVE ELECTRONIC VENT FAN DRIVER BOARD 5.2.5 REPLACE ELECTRONIC VENT FAN DRIVER BOARD RESTART HEATER 6 DEFECTIVE VENT FAN MOTOR 5.2.6 REPLACE VENT FAN MOTOR RESTART HEATER 7 DEFECTIVE WIRING HARNESS 5.5.6 REPLACE WIRING HARNESS RESTART HEATER 6.5.6 C3 – VENT FAN FAULT (Design Iteration 3 Only) VENT IMPELLER SPEED IS BELOW NORMAL LIMITS CHECK/POSSIBLE CAUSE REF. REPAIR 1 LOOSE CONNECTIONS ON THE VENT FAN BOARD 5.2.6 5.2.4 CHECK AND RECONNECT CONNECTORS J11, J10, AND J13 ON THE VENT FAN BOARD RESTART HEATER 2 WITH HEATER OFF, CHECK FOR FREE ROTATION OF THE VENT IMPELLOR BY SPINNING BY HAND 5.2.6 5.2.4 CHECK FOR OBSTRUCTIONS IF VENT IMPELLOR DOES NOT ROTATE FREELY, AND AMBIENT TEMPERATURE IS GREATER THAN 32°F (0°C), REPLACE VENT FAN MOTOR AND IMPELLOR RESTART HEATER IF THE AMBIENT TEMPERATURE IS BELOW 32°F (0°C), CHECK FOR AND REMOVE FROST OR OTHER SUBSTANCES AROUND THE VENT IMPELLOR RESTART HEATER. 3 VENT FAN GROUND WIRE IMPROPERLY CONNECTED 5.2.5 RECONNECT TO THE GROUND WIRE TO THE BURNER HOUSING BOLT RESTART HEATER 4 DEFECTIVE VENT FAN BOARD 5.2.5 5.5.6 REPLACE VENT FAN BOARD RESTART HEATER