TB-9-2320-279-13-1
TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM
OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS
DECEMBER 2005
TB-9-2320-279-13-1 - Page 58 of 524
TB 9-2320-279-13-1
(0010-1 blank)/0010-2
0010
AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE
DRAFT
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INITIAL SETUP:
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Maintenance Level
Field Level Maintenance
Equipment Condition
Shut off engine (TM 9-2320-279-10).
Parking brake applied (TM 9-2320-279-10).
Wheels chocked (TM 9-2320-279-10).
Tools and Special Tools
Tool Kit, General Mechanic’s (Item 7, Appendix F)
Multimeter (Item 2, Appendix F)
Materials/Parts
None
Personnel Required
MOS 52C, Utilities equipment repairer
References
TM 9-2320-279-10
TM 9-2320-279-20
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KNOWN INFO
None
POSSIBLE PROBLEMS
Circuit breaker No. 11 faulty.
Engine start switch faulty.
Wire 1640 faulty.
Wire 1082 faulty.
Fan control switch faulty.
Fan control switch harness connector loose
or faulty.
AC heater/evaporator blower motor resistor
harness connector loose or faulty.
AC heater/evaporator blower motor power
wire faulty.
AC heater/evaporator blower motor faulty.
AC heater/evaporator blower motor ground
wire faulty.
1.
Are 22 to 28 vdc measured on
circuit breaker No. 11,
terminal wire 1082, when
engine start switch is in the
ON position?
Go to Step 7 of this
fault.
NO
YES
Read WARNING on
page 0010-3.
WARNING
START
TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
If 22 to 28 vdc are not
measured, AC heater/
evaporator blower will not
operate.
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