FAULT CODE 050 OR 052: TOO MANY NO START ATTEMPTS OR NO START SAFETY TIME EXCEEDED. (Cont) -726250903

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

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).

Audible clicking and low fuel flow from the fuel metering pump may indicate that the arctic heater fuel

system isn't primed.

Fuel should flow from fuel line into container 63 seconds after arctic heater starts. Fuel will shut off

automatically after 105 seconds. Fuel will begin flow again after 50 to 60 second preheat, and will

turn off after 75 seconds (This indicates two start attempts). The arctic heater will shut down after

the second start attempt (one start cycle).

Total fuel quantity should be between 0.62 to 0.65 ounces (18.64 and 19.36 ml) in Steps (5) and (6).

VISUAL INSPECTION

(1) If installed, remove fault code retrieval

device (FCRD).

(2) Loosen clamp screw and disconnect

arctic heater fuel line from arctic heater

(TM 9-2320-364-20).

(3) Place arctic heater fuel line into graduated

1 quart (950 ml) measuring container.

(4) Turn arctic heater switch ON

(TM 9-2320-364-20).

(5) Observe fuel flowing into measuring

container.

(6) Turn arctic heater switch OFF when

fuel stops flowing after second start

attempt.

(7) Inspect measuring container for 0.62 to

0.65 ounces (18.64 to 19.36 ml).

(a) If arctic heater does not operate,

(lockout mode activated), perform

Step (8) below and go to Step 2 of

this Fault.

(b) If no or low fuel delivery and audible

clicking is heard from fuel metering

pump, go to Step 4 of this Fault.

than 0.62 ounces (18.64 ml) of fuel,

perform Step (8) below and replace

arctic heater fuel metering pump

(TM 9-2320-364-20).

(d) If fuel metering pump delivers

between 0.62 and 0.65 ounces (18.64

and 19.36 ml) of fuel, perform Step (8)

below and go to Step 6 of this Fault.

(8) Connect arctic heater fuel line to arctic

heater and tighten clamp screw.

2-819 -53