DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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WARNING
21.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Power to AC system OK.
Pressure test.
AC heater/evaporator blower OK.
AC test set manifold gage.
AC control circuit OK (except for temperature
Does AC test set recovery/
control and low pressure switches).
REASON FOR QUESTION
recycling manifold system
Low pressure switch OK.
If at least 30 psi pressure is
low-side gage indicate a
No AC condenser dryer desiccant
measured, AC low
contaminant in AC refrigerant system.
pressure of at least 30 psi?
pressure switch is faulty.
No AC refrigerant oil contaminant in AC
If not, AC system charge
refrigerant system.
is low.
No restricted AC hoses.
Check system for
AC compressor OK.
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loose fittings and
Temperature control switch OK.
damage. Tighten
AC expansion valve OK.
loose fittings and
No moisture in AC refrigerant system.
NO
repair damage.
No air or other contaminant in AC refrigerant
Perform leak test
system.
(WP 0052). Repair
AC condenser core OK.
any leaks found and
YES
replace AC dryer
AC system not overcharged.
(WP 0024). Evacuate
AC condenser dryer OK.
and charge system
AC evaporator core OK.
with new R-134a
refrigerant (WP 0053).
POSSIBLE PROBLEMS
Verify repair, go to
AC system charge low.
Step 22 of this fault.
AC system leaking.
Low pressure switch faulty.
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Replace AC low pressure
switch (WP 0040). Verify
repair, go to Step 22 of this
fault.
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0015-32