 |
|||
|
|
|||
|
Page Title:
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued |
|
||
| ||||||||||
|
|
 DRAFT
TB 9-2320-279-13-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
WARNING
6.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Power to AC system OK.
Pressure test.
AC heater/evaporator blower OK.
AC test set manifold gages.
AC control circuits OK (except for
Does AC test set recovery/
REASON FOR QUESTION
temperature control and low pressure
recycling manifold gage
switches).
To isolate system fault.
AC low pressure switch OK.
indicate low system high-side
No AC condenser dryer desiccant
pressure?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
contaminant in AC refrigerant system.
No AC refrigerant oil contaminant in AC
refrigerant system.
AC system charge is not low.
No AC system leaks.
AC condenser core OK.
AC expansion valve OK.
Go to Step 8 of this
NO
fault.
AC system not overcharged.
AC condenser dryer OK.
AC evaporator core OK.
YES
POSSIBLE PROBLEMS
Restricted AC hose.
AC compressor faulty.
Temperature control switch faulty.
Moisture in AC refrigerant system.
Air or other contaminant in AC refrigerant
system.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
WARNING
7.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Power to AC system OK.
Visual inspection.
AC heater/evaporator blower OK.
REASON FOR QUESTION
AC control circuits OK (except for
Are AC hoses from low-side
temperature control and low pressure
If frost or cool spots are
AC service valve to high-side
switches).
forming on AC hoses,
AC service valve free from
No moisture in AC refrigerant system.
AC hoses are restricting
frost and cool spots?
R-134a refrigerant flow.
AC low pressure switch OK.
If not, AC compressor is
No AC condenser dryer desiccant
faulty.
contaminant in AC refrigerant system.
No AC refrigerant oil contaminant in AC
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
refrigerant system.
Recover R-134a refrigerant
AC system charge is not low.
No AC system leaks.
AC hose (WP 0040) and AC
AC condenser core OK.
condenser dryer (WP 0025).
NO
Evacuate and charge system
AC expansion valve OK.
(WP 0050). Verify repair, go to
AC system not overcharged.
Step 22 of this fault.
AC condenser dryer OK.
YES
AC evaporator core OK.
Temperature control switch OK.
Recover R-134a refrigerant (WP 0050).
No air or other contaminant in AC refrigerant
Flush system (WP 0050). Then replace
system.
AC compressor (WP 0023) and AC
POSSIBLE PROBLEMS
condenser dryer (WP 0025). Evacuate
and charge system with new R-134a
Restricted AC hose.
AC compressor faulty.
of this fault.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
0015-12
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals