AC DOES NOT COOL OR COOLS INADEQUATELY

DRAFT

TB 9-2320-279-13-1

0015

AC DOES NOT COOL OR COOLS INADEQUATELY

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INITIAL SETUP:

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Materials/Parts

Maintenance Level

Gloves, Rubber (Item 2, Appendix E)

Field Level Maintenance

Personnel Required

Equipment Condition

MOS 52C, Utilities equipment repairer (2)

Shut off engine (TM 9-2320-279-10).

Parking brake applied (TM 9-2320-279-10).

References

Wheels chocked (TM 9-2320-279-10).

TM 9-2320-279-10

Tools and Special Tools

TM 9-2320-279-20

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)

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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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START

KNOWN INFO

Power to AC system OK.

AC heater/evaporator blower OK.

TEST OPTIONS

POSSIBLE PROBLEMS

Verify preliminary tests.

Was work package 0012 (AC

AC control circuits faulty.

Heater/Evaporator Blower

REASON FOR QUESTION

AC condenser dryer desiccant contaminant in

Operates But No Cold Air

AC refrigerant system.

If work package 0012 or 0014

From Ducts During AC

is not performed before

AC refrigerant oil contaminant in AC

Operations) or work package

performing this work

refrigerant system.

package, preliminary

0014 (AC Compressor Does

Restricted AC hose.

checks have not been

Not Shut Off Or Cycles

AC compressor faulty.

completed and inaccurate

Constantly) performed?

Moisture in AC refrigerant system.

results may occur.

Air or other contaminant in AC refrigerant

system.

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AC condenser core faulty.

Go to work package

AC expansion valve faulty.

0012 (AC Heater/

AC system overcharged.

Evaporator Blower

Operates But No

AC condenser dryer faulty.

Cold Air From Ducts

AC evaporator core faulty.

During AC

YES

AC system charge low.

Operations).

AC system leaking.

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