AC DOES NOT COOL OR COOLS INADEQUATELY

DRAFT

TB 9-2320-364-13&P-1

AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

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WARNING

4.

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KNOWN INFO

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Read WARNING on

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Power to AC system OK.

page 0015-9.

TEST OPTIONS

AC heater/evaporator blower OK.

Visual inspection.

AC control circuit OK (except for temperature

control and low pressure switches).

Does AC condenser dryer

REASON FOR QUESTION

Low pressure switch OK.

sight glass indicate system is

No AC condenser dryer desiccant

If system is not fully charged,

fully charged?

contaminant in AC refrigerant system.

system may not cool

properly.

No AC refrigerant oil contaminant in AC

refrigerant system.

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POSSIBLE PROBLEMS

AC system charge low.

Perform leak test

AC system leaking.

(WP 0052). If leaks

Restricted AC hoses.

NO

are found, recover

AC compressor faulty.

R-134a refrigerant

(WP 0053), repair

Temperature control switch faulty.

leaks, and replace

AC expansion valve faulty.

YES

AC dryer (WP 0024).

Moisture in AC refrigerant system.

Charge system to full

Air or other contaminant in AC refrigerant

charge (WP 0053)

system.

and go to Step 5 of

AC condenser core faulty.

this fault.

AC system overcharged.

AC condenser dryer faulty.

AC evaporator core faulty.

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