HEATER OPERATION FAULTS
Warning Faults
During operation, if an abnormal condition occurs, indicator light on heater control box will begin flashing and a
code (07 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 for
Warning Faults. Go to Personnel heater troubleshooting (WP 0089) 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 consisting of one flash followed by a 2-second delay. Refer to Table 2 for
Shutdown Faults. Then go to Personnel heater troubleshooting (WP 0089) and troubleshoot heater system. If any
other codes are displayed, notify maintenance.
Table 1.
Warning Faults.
E2
Low fuel pressure
F3
Heat limit
F6
Ambient over temperature
Table 2.
Shutdown 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
END OF TASK
TM 9-2350-256-10
0037
0037-5