TM-9-2320-341-10
TRUCK, TRACTOR, LIGHT EQUIPMENT TRANSPORTER (LET), 8X8 M983A4 LET
TECHNICAL MANUAL; OPERATOR'S MANUAL
OCTOBER 2008
TM-9-2320-341-10 - Page 635 of 962
DECISION
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Continue - Test 3 - Does arctic heater operate?
TEST 3 - Does arctic heater operate?
CAUTION
Do not attempt to operate arctic heater if arctic heater fails to start, or
shutdown occurs during normal operation. System shutdown may indi-
cate an arctic heater system fault. Failure to comply may cause system
lockout.
CAUTION
Do not operate arctic heater if arctic heater indicator light flashes during
normal operation. Arctic heater indicator light flashing indicates an arctic
heater system fault. Failure to comply may cause system lockout.
NOTE
If arctic heater does not operate, arctic heater may be in lockout mode
due to, either too many overheat occurrences (code 15), or too many start
attempts (code 50). Arctic heater lockout mode (code 50) is activated if
arctic heater fails to start after 20 successive start attempts (10 start cy-
cles in succession).
NOTE
The arctic heater will attempt to start two times per start cycle. After the
second failed start attempt, the arctic heater will not operate until the arc-
tic heater on/off switch is turned off, then back on.
NOTE
Audible clicking from the arctic heater fuel metering pump may indicate
that the arctic heater fuel system isn’t primed. If audible clicking is heard
from the arctic heater fuel metering pump, repeat steps (1) through (4)
four times, or until arctic heater starts. Do not attempt to start arctic heater
more than five times. The arctic heater should prime itself within nine start
attempts.
1.
Turn arctic heater ON.
2.
Observe arctic heater indicator light for steady illumination.
3.
Observe arctic heater for proper operation.
4.
Turn arctic heater on/off switch OFF.
TM 9-2320-341-10
0108
0108-3
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