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 6-2 6.1.2 “E” Codes - Operating Errors Operating Error codes are used to display faults which have a direct effect on the heater but which are generally caused by the vehicle or testing system. (i.e. external to heater) E1 Low Voltage E2 Low Fuel Pressure E3 Low Burner Air Flow E4 Reverse Burner Air Flow E5 Inlet Over Pressure E6 System Voltage 6.1.3 “F” Codes - Operating Faults Operating Faults are heater failures caused by operation of the heater outside the standard heater operating parameters. F1 Ignition Overtime F2 Burner Flame Out F3 Heat Limit F4 Vent Air Over Heat F5 Over Current F6 Ambient Over Temperature F7 Exhaust Over Temperature F8 Ignition Flame Out 6.2 Warning & Shutdown Faults The three types of Fault Codes (“C”, “E”, and “F”) can be broken into two categories: Warning Faults, and Shut-Down Faults. (ref. Table 6-1 and Table 6-2). If the Control Box Lamp begins to flash, the heater is signaling that an abnormal condition is present. The appropriate maintenance technician can correct this condition by referencing the heater diagnostic display and instructions in Section 6 (TROUBLESHOOTING) of this manual. If a Warning Fault in Table 6-1 is encountered, the heater will alternately display the fault code and the current run code (07 or 14) on the Diagnostic Display. If possible, the heater will adjust its operation to compensate for the condition. If the condition continues and operation is no longer possible, the heater will enter Purge mode, and steadily display the fault. With the exception of the Low Fuel Pressure and Fuel Pressure Sensor Fault warnings, the Control Box Lamp will not flash if a Warning fault is displayed. In the case of a Low Fuel Pressure Fault, the Control Box Lamp will flash in a cycle comprising two (2) quick flashes followed by a two (2) second delay. In the case of a Fuel Pressure Sensor Fault, the Control Box Lamp will flash in a cycle comprising three (3) quick flashes followed by a two (2) second delay. If a Shut Down fault in Table 6-2 is encountered, the heater will automatically enter shutdown mode. In shutdown mode the heater will purge combustion and vent air for a period of 3 minutes to clear out combustible fumes and excess heat. During this time the control box controls are locked out; the Diagnostic Display will display the fault code; and the Control Box Lamp will flash in a cycle comprising one (1) flash followed by a two (2) second delay. Once the shutdown purge cycle is completed the heater will automatically switch off and can be restarted.