TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9--2350--311--10 2--252 Change 6 2--17 OPERATING AUXILIARY EQUIPMENT — CONTINUED 2--17.1 Personnel Heater (P/N 11669489--1 and 11669490--1) — Continued c. Heater Operation Faults (Global A20) Warning Faults During operation, if an abnormal condition occurs, indicator light on heater control box will begin flashing and a code (04 or 14) will be displayed on diagnostic display. The heater will try to correct the fault. If fault cannot be corrected, heater will continue to operate until an unsafe condition or component failure FAULT occurs. Then heater will automatically shut down and a failure code will be displayed on the diagnostic display. (Refer to Table 1 Warning Faults). Go to para 3--4 and troubleshoot heater system. Shutdown Faults If, during operation, a shutdown fault occurs, the heater will immediately enter the shutdown and purge modes to avoid operating in an unsafe condition. The diagnostic display will display the fault mode and the control box indicator lamp will flash in cycle composing of one flash followed by a 2--second delay. Refer to Table 2 for Shutdown Faults. Then go to para 3--4 and troubleshoot heater system. E2 Low Fuel Pressure F3 Heat Limit F6 Ambient Over Temperature Table 1 WARNING Faults C3 Vent Fan Fault E1 Low Voltage E3 Low Burner Air Flow F1 Ignition Overtime F2 Burner Flameout F4 Vent Air Overheat F7 Exhaust Overheat Table 2 SHUTDOWN Faults If any other codes are displayed, notify UNIT maintenance.