TM-9-2350-261-10

CARRIER, M113A2, M577A2, M1064, M1068, M1059 AND M901A1

OPERATOR'S MANUAL

TM-9-2350-261-10 - Page 437 of 761

TM 9-2350-261-10

TROUBLESHOOTING TABLE — Continued

0074 00

INITIAL SETUP:

Maintenance Level

Operator

ENGINE COOLANT HEATER

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1.

HEATER DOES

NOT START WITH

RUN-OFF-START

SWITCH HELD IN START

POSITION. HEATER

MOTOR RUNS.

1.

Check to see if fuel tank manual shutoff

valve is closed.

Open fuel tank manual shutoff

valve (WP 0004 00).

2.

HEATER DOES

NOT START WITH

RUN-OFF-START

SWITCH HELD IN START

POSITION. HEATER

MOTOR DOES NOT RUN.

1.

Push PRESS-TO-TEST switch on engine

coolant heater control box to test for

electrical power. If light does not light,

check for loose electrical connections at

control box and heater.

Tighten loose connections.

2.

Check to see if battery connections are tight.

Notify unit maintenance to tighten

loose battery connections.

3.

COOLANT HEATER

OVERHEATS.

1.

Check to see if one or both coolant shutoff

valves are closed.

Open coolant shutoff valves

(WP 0060 00).

4.

COOLANT HEATER

OUTPUT IS TOO LOW.

1.

Check to see if the HI-LO switch is in LO

position.

Move HI-LO switch to HI position

(WP 0060 00).

5.

BATTERIES OVERHEAT.

1.

Air temperature is too warm to need engine

coolant heater

Turn off engine coolant heater

(WP 0060 00). You do not need

to use engine coolant heater

if temperature is above 25 F

(-32 C).

2.

Engine is running at same time as engine

coolant heater.

Turn off engine coolant heater

(WP 0060 00) as soon as engine

starts.

3.

Batteries are overcharged and boiling out

liquid.

Record faults on DA Form 2404

and notify unit maintenance.

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