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Page Title:
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued |
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 DRAFT
TB 9-2320-279-13-1
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 circuits OK (except for
Does AC test set recovery/
REASON FOR QUESTION
temperature control and low pressure
recycling manifold system
switches).
If at least 30 psi pressure is
No moisture in AC refrigerant system.
low-side gage indicate a
measured, AC low
AC low pressure switch OK.
pressure of at least 30 psi?
pressure switch is faulty.
If not, AC system charge
No AC condenser dryer desiccant
is low.
contaminant in AC refrigerant system.
No AC refrigerant oil contaminant in AC
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refrigerant system.
Check system for
loose fittings and
No restricted AC hoses.
damage. Tighten
AC compressor OK.
loose fittings and
Temperature control switch OK.
NO
repair damage.
No air or other contaminant in AC refrigerant
Perform leak test
system.
(WP 0049). Repair
AC condenser core OK.
any leaks found and
YES
AC expansion valve OK.
replace AC dryer
(WP 0025). Evacuate
AC system not overcharged.
and charge system
AC condenser dryer OK.
with new R-134a
AC evaporator core OK.
refrigerant (WP 0050).
Verify repair, go to
POSSIBLE PROBLEMS
Step 22 of this fault.
AC low pressure switch faulty.
AC system charge low.
AC system leaking.
Replace AC low pressure
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switch (WP 0041). Verify
repair, go to Step 22 of this
fault.
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0015-30
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