Table 21. Personnel Fuel Burning Heater Troubleshooting Procedures.

TM 9-2320-361-24-1

0006 00

MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)

Table 21. Personnel Fuel Burning Heater Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 1. Check horn operation.

1. If horn is operational, voltage is

1. HEATER WILL NOT

Push horn button.

present at input of personnel

OPERATE IN HIGH OR

heater circuit breaker. Go to

LOW SWITCH POSITION

test 2.

2. If horn fails to operate, go to

WP 0014 00, table 1,

malfunction 10.

Test 2. Test lead 10 for power input

to heater control box.

1. Set multimeter to range

that will measure 24 VDC.

2. Disconnect lead 10 from

heater control box.

3. Touch multimeter positive

lead to contact end of

lead 10.

4. Touch negative lead of

1. If voltage is present, go to test 3.

multimeter to frame

2. If voltage is not present, repair or

ground. Voltage should be

replace lead 10 (WP 0090 00).

present.

Test 3. Check heater control box for

power output.

1. Set multimeter to range

that will measure 24 VDC.

2. Disconnect harness

connector from rear of

control box.

3. Set heater control switch to

START and hold.

4. Set heater control heat

switch to HIGH.

5. Touch positive lead of

multimeter to pin A.

6. Touch negative lead of

multimeter to frame

ground.

7. Repeat steps 5 and 6 for

1. If voltage is present at all pins

pins B, C, and D. Voltage

tested, go to test 4.

should be present.

2. If voltage is not present at one or

more pins, replace heater control

box (WP 0352 00).

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