TM-9-2350-311-10

TM-9-2350-311-10 - Page 350 of 775

TM 9--2350--311--10

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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 flashincyclecomposing 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.

Low Fuel Pressure

Heat Limit

Ambient Over Temperature

Table 1 WARNING Faults

Vent Fan Fault

Low Voltage

Low Burner Air Flow

Ignition Overtime

Burner Flameout

Vent Air Overheat

Exhaust Overheat

Table 2 SHUTDOWN Faults

If any other codes are displayed, notify UNIT maintenance.