TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
16.
WARNING
KNOWN INFO
Read WARNING on
Power to A/C system OK.
page 0042 00-23.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Does A/C test set recovery/
binary switch and A/C
recycling manifold gages
thermostatic switch).
indicate high system high
A/C receiver/dryer moisture
TEST OPTIONS
side pressure?
indicator indicates no moisture in
Pressure Test.
system.
A/C Test Set Manifold Gage.
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 is not leaking.
A/C system charge is not low.
A/C thermostatic switch OK.
Go to Step 19 of
No air or other contaminant in A/C
NO
this fault.
system.
A/C compressor OK.
YES
A/C engine fan control circuit OK.
A/C condenser OK.
A/C system is not overcharged.
POSSIBLE PROBLEMS
Restricted A/C hose.
A/C expansion valve faulty.
A/C receiver/dryer faulty.
A/C evaporator faulty.
KNOWN INFO
TEST OPTIONS
17.
WARNING
Read WARNING on
Power to A/C system OK.
Visual Inspection.
page 0042 00-23.
A/C circuit wiring OK.
REASON FOR QUESTION
A/C controls OK (except for A/C
If frost or cool spots are forming on
Are A/C hoses from A/C
binary switch and A/C
A/C hoses, A/C hoses are
compressor output to A/C
thermostatic switch).
restricting R-134a flow.
A/C receiver/dryer moisture
expansion valve free from
indicator indicates no moisture in
frost and cool spots?
system.
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.
A/C system charge is not low.
Replace restricted A/C
A/C thermostatic switch OK.
hose (WP 0052 00), A/C
No air or other contaminant in A/C
receiver/dryer (WP 0054
NO
system.
00), and R-134a (WP 0056
A/C compressor OK.
00). Verify repair, go to
A/C engine fan control circuit OK.
YES
Step 23 of this fault.
A/C condenser OK.
A/C system is not overcharged.
A/C evaporator OK.
POSSIBLE PROBLEMS
Restricted A/C hose.
A/C expansion valve faulty.
A/C receiver/dryer faulty.
0042 00-22
