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Page Title:
AC DOES NOT COOL OR COOLS INADEQUATELY - continued |
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 DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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WARNING
18.
KNOWN INFO
Read WARNING on
Power to AC system OK.
AC heater/evaporator blower OK.
AC control circuit OK (except for temperature
Is AC condenser dryer free
control and low pressure switches).
from frost, sweating, and cool
Low pressure switch OK.
TEST OPTIONS
spots?
No AC condenser dryer desiccant
Visual inspection.
contaminant in AC refrigerant system.
No AC refrigerant oil contaminant in AC
REASON FOR QUESTION
refrigerant system.
Recover R-134a
AC system charge is not low.
If AC condenser dryer is free
refrigerant (WP 0053).
from frost and cool spots,
No AC system leaks.
Replace AC condenser
AC expansion valve is
Temperature control switch OK.
dryer (WP 0024).
faulty. If not, AC
NO
Evacuate and charge
No air or other contaminant in AC refrigerant
condenser dryer is faulty.
system (WP 0053).
system.
Verify repair, go to
AC compressor OK.
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Step 22 of this fault.
YES
No moisture in AC refrigerant system.
AC condenser core OK.
AC system not overcharged.
AC evaporator core OK.
Recover R-134a refrigerant
(WP 0053). Replace AC
No restricted AC hoses.
expansion valve (WP 0030)
POSSIBLE PROBLEMS
and AC condenser dryer
AC expansion valve faulty.
charge system (WP 0053).
AC condenser dryer faulty.
Verify repair, go to Step 22 of
this fault.
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WARNING
19.
KNOWN INFO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Read WARNING on
TEST OPTIONS
Power to AC system OK.
AC heater/evaporator blower OK.
Visual inspection.
AC control circuit OK (except for temperature
REASON FOR QUESTION
control and low pressure switches).
Is AC hose from AC
Low pressure switch OK.
evaporator core to AC
If frost or cool spots are
No AC condenser dryer desiccant
forming on AC hose, AC
compressor free from frost
contaminant in AC refrigerant system.
hose is restricting R-134a
and cool spots?
refrigerant flow.
No AC refrigerant oil contaminant in AC
refrigerant system.
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AC system charge is not low.
No AC system leaks.
Recover R-134a
Temperature control switch OK.
refrigerant (WP 0053).
No air or other contaminant in AC refrigerant
Replace restricted AC
system.
hose (WP 0039) and
AC compressor OK.
AC condenser dryer
NO
No moisture in AC refrigerant system.
(WP 0024). Evacuate
AC condenser core OK.
and charge system
(WP 0053). Verify
AC system not overcharged.
YES
repair, go to Step 22 of
AC evaporator core OK.
this fault.
POSSIBLE PROBLEMS
Restricted AC hose.
AC expansion valve faulty.
AC condenser dryer faulty.
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0015-28
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