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 3-4 Heater Data Codes Mode (Continued). Note: The codes below will appear with a lower case “d” for A20 design iteration version 3 and above (see Section 5 for details on design iteration versions). D1 - OPERATION HOURS Display code D1 will be followed successively by a pair of two digit numbers (4 numbers in total) indicating the total number of hours that the heater has operated. For example D1 followed by 12 followed by 34 means - the heater has operated 1,234 hours. D2 - NUMBER OF STARTS Display code D2 will be followed successively by a pair of two digit numbers (4 numbers in total) indicating the total number of starts that the heater has experienced. For example D2 followed by 22 followed by 17 means - the heater has been started 2,217 times. D3 - VERSION LEVEL Display code D3 will be followed by a two digit number that is the version number of the Heater Software. For example D3 followed by 02 means - the Heater Software is production version 2. One minute after switching the heater off, the diagnostic system will display hours, starts, and version level of the heater. See Data Codes Mode Example, Table 3-5, which illustrates the display code sequence for the examples presented above (D1, D2, and D3). The shaded segments in Table 3-5 represent the time when the display is blank for one (1) second. The ‘real world’ numeric values associated with the respective Data Codes in the display will likely vary from those shown in the Example below. D1 1 2 3 4 D2 2 2 1 7 D3 0 2 Table 3.7-2. Data Codes Mode Example 3.8 Warning & Shutdown Faults 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 diagnostic codes and instructions in Section 6 (TROUBLESHOOTING) of this manual. If a Fuel Pressure Sensor or Low Fuel Pressure Warning Fault, or any of the Shut Down faults is encountered during Start Up or ignition is not achieved in the allowable 3 ½ minutes, the heater will enter Purge mode, flash the Control Box Lamp, and display the component fault. If a Warning Fault is encountered during Run operations, 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 Warning 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