TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
KNOWN INFO
5.
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-11.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Does A/C test set recover/
binary switch and A/C
recycling manifold gage
thermostatic switch).
A/C receiver/dryer moisture
indicate low system high side
TEST OPTIONS
indicator indicates no moisture in
pressure?
Pressure Test.
system.
A/C Test Set Manifold Gages.
A/C binary switch OK.
A/C receiver/dryer sight glass
REASON FOR QUESTION
indicates no desiccant
To isolate system fault.
breakdown or oil in system.
A/C system charge is not low.
A/C engine fan control circuit OK.
A/C condenser OK.
Go to Step 7 of
A/C expansion valve OK.
NO
this fault.
A/C system is not overcharged.
A/C receiver/dryer OK.
A/C evaporator OK.
YES
POSSIBLE PROBLEMS
A/C compressor faulty.
Restricted A/C hose.
A/C thermostatic switch faulty.
Air or other contaminant in A/C
system.
A/C system leaking.
KNOWN INFO
6.
WARNING
Read WARNING on
TEST OPTIONS
Power to A/C system OK.
page 0042 00-11.
A/C circuit wiring OK.
Visual Inspection.
A/C controls OK (except for A/C
REASON FOR QUESTION
Are A/C hoses from A/C low
binary switch and A/C
side service valve to high side
thermostatic switch).
If frost or cool spots are forming on
A/C receiver/dryer moisture
service valve free from frost
A/C hoses, A/C hoses are
indicator indicates no moisture in
and cool spots?
restricting R-134a flow. If not,
system.
A/C compressor is faulty.
A/C binary switch OK.
A/C receiver/dryer sight glass
indicates no desiccant
breakdown or oil in system.
A/C system is not leaking.
Replace restricted A/C
A/C system charge is not low.
hose (WP 0052 00), A/C
A/C engine fan control circuit OK.
receiver/dryer
NO
A/C condenser OK.
(WP 0054 00), and R-134a
A/C expansion valve OK.
(WP 0056 00). Verify
A/C system is not overcharged.
repair, go to Step 23 of this
A/C receiver/dryer OK.
YES
fault.
A/C evaporator OK.
A/C thermostatic switch OK.
Replace A/C compressor
No contaminants in A/C system.
(WP 0045 00), A/C
POSSIBLE PROBLEMS
receiver/dryer
A/C compressor faulty.
(WP 0054 00) and R-134a
Restricted A/C hose.
(WP 0056 00). Verify
repair, go to Step 23 of this
fault.
0042 00-10
