FAULT CODE 050 OR 052: TOO MANY NO START ATTEMPTS OR NO START SAFETY TIME EXCEEDED. (Cont) -726250911

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.

Fuel is very flammable and can explode easily. To avoid serious injury or death, keep fuel away from open fire

and keep fire extinguisher within easy reach when working with fuel. Do not work on fuel system when engine is

hot. Fuel can be ignited by hot engine.

NOTE

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

operation.

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.

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).

Perform Steps (5) and (6) only if fault code retrieval device (FCRD) is available.

VERIFY REPAIR

(1) If disconnected, connect fuel line on arctic

heater and tighten screw (TM 9-2320-364-20).

(2) If removed, install arctic heater control unit

and three screws (Para 18-2.2).

(3) If disconnected, connect arctic heater unit

harness connector to arctic heater control unit

(TM 9-2320-364-20).

(4) Ensure vehicle is returned to normal operating

condition.

(5) Install fault code retrieval device (FCRD)

(TM 9-2320-364-20) on arctic heater unit

harness diagnostic connector.

(6) Press the D button on fault code retrieval

device (FCRD) to turn arctic heater ON.

(7) Turn arctic heater ON (TM 9-2320-364-10).

(8) Observe arctic heater indicator light or fault

code retrieval device (FCRD) display, if

installed. Note if arctic heater indicator light

flashes code shown.

(9) Observe arctic heater for proper operation.

(10)Turn arctic heater switch to OFF

(TM 9-2320-364-10) or press the D button on

the fault code retrieval device (FCRD), if

installed.

(11) If installed, remove fault code retrieval device

(FCRD).

(12)Install arctic heater cover (TM 9-2320-364-20).

(a) If arctic heater operates normally and arctic

heater indicator light is illuminated (Fault

code 000 displayed on FCRD), fault has

been corrected.

(b) If arctic heater does not operate and arctic

heater indicator light flashed flash code

shown (Fault 050 displayed on FCRD), go

to Step 8 of this Fault.

heater indicator light flashed flash code

shown (Fault code 052 displayed on

FCRD), notify supervisor.

(d) If arctic heater indicator light flashed flash

code (Fault code other than 052 or 052

displayed on FCRD), troubleshoot arctic

heater fault code displayed

(TM 9-2320-364-20).

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