FAULT CODE 050 OR 052: TOO MANY NO START ATTEMPTS OR NO START SAFETY TIME EXCEEDED. (Cont) -726250899

TM 9-2320-364-34-1

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical circuits, a

direct short may result. Damage to equipment, injury or death to personnel may occur.

NOTE

Refer to arctic heater (Model B) troubleshooting (TM 9-2320-364-20) for fault code retrieval device (FCRD)

operation.

If arctic heater does not operate, arctic heater may be in lockout mode due to too many start attempts (code

050). Arctic heater lockout mode (code 050) is activated if arctic heater fails to start after 20 successive start

attempts (10 successive start cycles).

An audible whine will be heard after the system check is completed, indicating the blower motor has switched

on and the system is operating. Audible clicking may also be heard from the fuel metering pump if the arctic

heater fuel system isn't primed.

If the fault code retrieval device (FCRD) is not installed, the arctic heater indicator light displays the diagnostic

flash codes for the arctic heater. These flash codes are 8 seconds long and repeat after 8 seconds.

The fault code retrieval device (FCRD) displays the last 5 faults that occur. The latest fault displayed is either

AF or F1. If more than one fault code is displayed, troubleshoot the latest fault code first.

Perform Steps (2) and (3) only if fault code retrieval device (FCRD) is available.

VISUAL INSPECTION

(1) Remove cover from arctic heater

(TM 9-2320-364-20).

(2) Install fault code retrieval device

(FCRD) on arctic heater unit harness

diagnostic connector.

(3) Press the D button on fault code

retrieval device (FCRD) to turn arctic

heater ON.

(4) Turn arctic heater ON

(TM 9-2320-364-10).

(5) Observe arctic heater indicator light or

fault code retrieval device (FCRD)

display, if installed. Note if arctic heater

indicator light flashes code shown.

(6) Observe arctic heater for proper

operation.

(7) Turn arctic heater switch OFF

(TM 9-2320-364-10) or press the

D button on the fault code retrieval

device (FCRD), if installed.

(a) If arctic heater does not operate and

arctic heater indicator flashed code

shown (Fault code 050 displayed

on FCRD), go to Step 2 of this Fault.

(b) If arctic heater attempts to start, go

to Step 6 of this Fault.

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