TM 9-4520-272-14&P
0008 00
charged.
start heater, and recharge batteries
until fully charged.
Step 4. If further corrective action is
required, notify Unit Maintenance.
2.
Heater will not start after 3
Step 1. The heater will attempt to restart
Step 1. Attempt up to three restart
attempts
3 times on its own. Determine if the
cycles in 60 minutes.
heater has completed a restart cycle
Step 2. If further corrective action is
attempt.
required, notify Unit Maintenance.
3.
Heater starts but sputters or
Step 1. Check the fuel gauge and verify
Step 1. Turn power switch OFF. Fill
runs erratically
that there is sufficient fuel.
the fuel tank with an approved fuel
and/or replenish the external fuel
supply with adequate supply of
approved fuel. Attempt restart.
Step 2. Verify that the fuel being
Step 2. Fill internal tank or bulk fuel
supplied is of an approved type and that
supply with that fuel is clean and not
it is clean and not contaminated.
contaminated.
Step 3. If heater has been switched
Step 3. Allow heater to operate long
from internal to external fuel mode,
enough to expel all air that may be
verify that heater has operated long
present in the external fuel hose.
enough to expel all air in the external
fuel hose. This may only be a problem if
Step 4. If problem persists, notify
fuel level in internal tank is very low
unit maintenance.
when switched to external.
4.
Heater runs then shuts down
Step 1. Verify that there is sufficient fuel
Step 1. Turn power switch OFF. Fill
unexpectedly with no fault
in the fuel tank or that the external fuel
the fuel tank with an approved fuel
code displayed on control
supply has sufficient fuel
and/or replenish the external fuel
panel
supply with adequate supply of
approved fuel. Attempt restart.
Step 2. If heater runs then shuts
down unexpectedly again, notify unit
maintenance for further corrective
action.
5.
Heater starts, displays fault
Step 1. This fault code indicates that the
Step 1. Clear any blockage at air
code: S412 but continues to
heat exchanger over-temperature
inlet or air outlet duct.
run
switch SW4 has been activated. Turn
Step 2. Flip RESET switch, attempt
power switch OFF. Check and ensure
restart. If problem has not been
that there is no blockage at air inlet or
corrected, notify unit maintenance.
outlet duct.
6.
Heater starts, displays fault
Step 1. This fault code indicates that the
Step 1. Clear any blockage on air
code: S411 but continues to
heat exchanger airflow has been
inlet or air outlet duct. Flip RESET
run
blocked or restricted. Turn power switch
switch, attempt restart.
OFF. Check for blockage on air inlet or
air outlet duct.
Step 2. Check for loose inlet fan. A
Step 2. If a loose inlet fan is
visible wobble or rubbing on the fan
suspected, notify unit maintenance.
housing would be evidence that inlet fan
is loose. If this is suspected, notify unit
maintenance.
0008 00-2
