AC DOES NOT COOL OR COOLS INADEQUATELY - continued

DRAFT

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

AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

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WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to AC system OK.

Visual inspection.

page 0015-7.

AC heater/evaporator blower OK.

AC test set manifold gages.

AC control circuit OK (except for temperature

Does AC condenser dryer

REASON FOR QUESTION

control and low pressure switches).

sight glass indicate system is

Low pressure switch OK.

If AC condenser dryer sight

free from desiccant

glass indicates desiccant

POSSIBLE PROBLEMS

breakdown and oil?

breakdown or oil in

system, system must be

AC condenser dryer desiccant contaminant in

flushed.

AC refrigerant system.

AC refrigerant oil contaminant in AC

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refrigerant system.

AC system charge low.

Perform leak test

AC system leaking.

(WP 0052). Recover

Restricted AC hoses.

R-134a refrigerant

AC compressor faulty.

(WP 0053). Repair

any leaks found.

Temperature control switch faulty.

Flush system

AC expansion valve faulty.

YES

(WP 0053). Replace

Moisture in AC refrigerant system.

AC condenser dryer

Air or other contaminant in AC refrigerant

(WP 0024).

system.

Evacuate and charge

AC condenser core faulty.

system with new

AC system overcharged.

R-134a refrigerant

(WP 0053). Go to

AC condenser dryer faulty.

Step 4 of this fault.

AC evaporator core faulty.

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0015-6