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Page Title: FAULT CODE 033: BLOWER MOTOR SPEED FAULT. (Cont)
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TM 9-2320-364-34-1
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical circuits, a
direct short may result. Damage to equipment, injury or death to personnel may occur.
NOTE
An audible whine should be heard when power is applied, indicating the arctic heater blower motor is operating.
VISUAL INSPECTION
(1) Remove cover from arctic heater
(TM 9-2320-364-20).
(2) Disconnect arctic heater unit harness
connector from arctic heater control unit
(TM 9-2320-364-20).
(3) Remove three screws and arctic heater
control unit (Para 18-2.2).
(4) Connect 24 vdc power supply positive (+)
lead to orange wire at arctic heater
internal harness connector, terminal 1.
(5) Connect 24 vdc power supply negative (-)
lead to black wire at arctic heater internal
harness connector, terminal 4.
(6) Turn 24 vdc power supply ON and
apply power to circuit.
(7) Observe operation of blower motor.
(8) Turn 24 vdc power supply OFF.
(a) If arctic heater blower motor does
not operate, replace arctic heater
blower (Para 18-2.2).
(b) If arctic heater blower motor
operates, go to Step 2 of this Fault.
2-821 5
0-3

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