TM 9-2350-277-10
TROUBLESHOOTING TABLE -- Continued
0089 00
INITIAL SETUP:
Maintenance Level
Operator
ENGINE COOLANT HEATER
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
HEATER DOES
1.
Check to see if fuel tanks manual shutoff
Open fuel tanks manual shutoff
NOT START WITH
valves are closed.
valves (WP 0004 00).
RUN-OFF-START
SWITCH HELD IN START
POSITION. HEATER
MOTOR RUNS.
2.
HEATER DOES
1.
Push PRESS-TO-TEST switch on engine
Tighten loose connections.
NOT START WITH
coolant heater control box to test for
RUN-OFF-START
electrical power. If light does not work,
SWITCH HELD IN START
check for loose electrical connections at
POSITION. HEATER
control box and heater.
MOTOR DOES NOT RUN.
2.
Check to see if battery connections are tight.
Notify unit maintenance to tighten
loose battery connections.
3.
COOLANT HEATER
1.
Check to see if one or both coolant shutoff
Open coolant shutoff valves
OVERHEATS.
valves are closed.
4.
COOLANT HEATER
1.
Check to see if the HI-LO switch is in LO
Move HI-LO switch to HI position
OUTPUT IS TOO LOW.
position.
5.
BATTERIES OVERHEAT.
1.
The air temperature is too warm to need the
Turn off engine coolant heater
engine coolant heater
to use engine coolant heater if
temperature is above -25 F (-32
C).
2.
The engine is running at the same time as the
Turn off engine coolant heater
engine coolant heater.
(WP 0062 00) as soon as the
engine starts.
Change 4
