Table 1. Heating Systems Troubleshooting Procedures - continued

TM 9-2320-361-24-1

0015 00

HEATING SYSTEMS TROUBLESHOOTING (Contd)

Table 1. Heating Systems Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 4. Test personnel heater for

2. HOT WATER

power input.

PERSONNEL HEATER

DOES NOT OPERATE

1 Ensure heater switch is in

OR DOES NOT

high position.

OPERATE IN LOW

2. Set multimeter to a range

POSITION (Contd)

that will measure 24 VDC.

3. Disconnect lead 400 from

personnel heater.

4. Touch multimeter positive

lead to contact end of lead

400.

5. Touch multimeter negative

1. If voltage is not present, repair or

lead to frame ground. Voltage

replace lead 400 (WP 0090 00).

should be present.

2. If voltage is present, and personnel

heater fails to operate, replace

personnel heater (WP 0250 00).

Test 5. Test blower motor resistor.

1. Set multimeter to RX 1.

2. Ensure heater switch is set to

low position.

3. Touch positive lead of

multimeter to one lead on

resistor.

4. Touch negative lead of

If resistance is not within tolerance of

multimeter to the other end

4.5 ohms and 5.5 ohms, replace

of resistor.

resistor (WP 0117 00).

TEST 4

STEPS 4

AND 5

LEAD

400

0015 00-8