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 170 of 524
TB 9-2320-279-13-1
(0015-1 blank)/0015-2
0015
AC DOES NOT COOL OR COOLS INADEQUATELY
DRAFT
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NOTE
•
Work package 0012 or 0014 must be performed before performing this work package.
•
AC condenser dryer must be replaced whenever system R-134a refrigerant is recovered.
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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
Goggles (Item 1, Appendix F)
Tool Kit, General Mechanic’s (Item 7, Appendix F)
Leak Detector, Refrigerant (Item 1, Appendix H)
Reclaimer, Refrigerant (Item 2, Appendix H)
Materials/Parts
Gloves, Rubber (Item 2, Appendix E)
Personnel Required
MOS 52C, Utilities equipment repairer (2)
References
TM 9-2320-279-10
TM 9-2320-279-20
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KNOWN INFO
Power to AC system OK.
AC heater/evaporator blower OK.
POSSIBLE PROBLEMS
AC control circuits faulty.
AC condenser dryer desiccant contaminant in
AC refrigerant system.
AC refrigerant oil contaminant in AC
refrigerant system.
Restricted AC hose.
AC compressor faulty.
Moisture in AC refrigerant system.
Air or other contaminant in AC refrigerant
system.
AC condenser core faulty.
AC expansion valve faulty.
AC system overcharged.
AC condenser dryer faulty.
AC evaporator core faulty.
AC system charge low.
AC system leaking.
1.
Was work package 0012 (AC
Heater/Evaporator Blower
Operates But No Cold Air
From Ducts During AC
Operations) or work package
0014 (AC Compressor Does
Not Shut Off Or Cycles
Constantly) performed?
Go to work package
0012 (AC Heater/
Evaporator Blower
Operates But No
Cold Air From Ducts
During AC
Operations).
NO
YES
START
TEST OPTIONS
Verify preliminary tests.
REASON FOR QUESTION
If work package 0012 or 0014
is not performed before
performing this work
package, preliminary
checks have not been
completed and inaccurate
results may occur.
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