DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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WARNING
10.
KNOWN INFO
Read WARNING on
Power to AC system OK.
TEST OPTIONS
AC heater/evaporator blower OK.
Pressure test.
AC control circuit OK (except for temperature
AC test set manifold gage.
control and low pressure switches).
Does AC test set recovery/
Low pressure switch OK.
recycling manifold gages
REASON FOR QUESTION
No AC condenser dryer desiccant
indicate high system low-side
contaminant in AC refrigerant system.
To isolate system fault.
pressure?
No AC refrigerant oil contaminant in AC
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refrigerant system.
AC system charge is not low.
No AC system leaks.
Temperature control switch OK.
No air or other contaminant in AC refrigerant
system.
Go to Step 16 of this
NO
fault.
POSSIBLE PROBLEMS
Restricted AC hoses.
YES
AC compressor faulty.
AC expansion valve faulty.
Moisture in AC refrigerant system.
AC condenser core faulty.
AC system overcharged.
AC condenser dryer faulty.
AC evaporator core faulty.
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WARNING
11.
KNOWN INFO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Read WARNING on
TEST OPTIONS
Power to AC system OK.
AC heater/evaporator blower OK.
Pressure test.
AC control circuit OK (except for temperature
AC test set manifold gage.
control and low pressure switches).
Does AC test set recovery/
REASON FOR QUESTION
Low pressure switch OK.
recycling manifold gages
No AC condenser dryer desiccant
indicate high system high-
To isolate system fault.
contaminant in AC refrigerant system.
side pressure?
No AC refrigerant oil contaminant in AC
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
refrigerant system.
AC system charge is not low.
No AC system leaks.
Temperature control switch OK.
No air or other contaminant in AC refrigerant
system.
Go to Step 14 of this
NO
fault.
AC condenser dryer OK.
AC evaporator core OK.
YES
POSSIBLE PROBLEMS
Restricted AC hoses.
AC compressor faulty.
AC expansion valve faulty.
Moisture in AC refrigerant system.
AC condenser core faulty.
AC system overcharged.
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0015-16
