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 6-1 6 TROUBLESHOOTING This section explains the diagnostic system used by the A20 heater to aid in the determination and repair of heater malfunctions, as well as guiding the user through a step by step procedure to rectify problems based on the particular diagnostic code given. Note: In some installations the diagnostic display is not visible. A remote display is available as an accessory. Contact manufacturer for details. 6.1 Diagnostic Fault Codes Note: Operating Codes 00 to 07, 14 and 99, as well as Data Codes D1, D2, and D3 are displayed as part of normal operation and do not require any maintenance actions. To assist heater maintenance, a diagnostic system has been developed to isolate the problem area. This section gives a brief explanation of the fault codes used by the A20 heater. Three different types of Diagnostic Fault Codes are used: Component Failure Codes (”C”), Operating Error Codes (“E”), and Operating Faults (“F”). Note: If the Diagnostic Display appears blank and the heater is operating, the Diagnostic Display circuit has failed, see 5.8.2. 6.1.1 “C” Codes - Component Failures Component Failure codes are designed to identify hardware faults. C1 Ignitor Fault C2 Ignitor Short C3 Vent Fan Fault C4 Burner Fan Fault C5 Burner/Exhaust Sensor Fault C6 Vent Sensor Fault C7 Fuel Pressure Sensor Fault C8 Controller Fault C9 Fuel Pump Fault CA Fuel Injector Fault