TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
KNOWN INFO
21.
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-29.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Is continuity measured
binary switch and A/C
across A/C binary switch
thermostatic switch).
terminals?
A/C receiver/dryer moisture
TEST OPTIONS
indicator indicates no moisture in
Continuity Test.
system.
A/C receiver/dryer sight glass
indicates no desiccant
REASON FOR QUESTION
breakdown or oil in system.
If continuity is measured, A/C
Restricted A/C hose.
compressor is faulty.
A/C thermostatic switch OK.
No air or other contaminant in A/C
system.
Go to Step 22 of
A/C engine fan control circuit OK.
this fault.
NO
A/C condenser OK.
A/C expansion valve OK.
A/C system is not overcharged.
YES
A/C receiver/dryer OK.
A/C evaporator OK.
Replace A/C compressor
POSSIBLE PROBLEMS
(WP 0045 00), A/C
A/C compressor faulty.
receiver/dryer (WP 0054
A/C system charge low.
00), and R-134a (WP 0056
A/C system leaking.
00). Verify repair, go to
A/C binary switch faulty.
Step 23 of this fault.
22.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING on
Power to A/C system OK.
Pressure Test.
page 0042 00-29.
A/C circuit wiring OK.
A/C Test Set Manifold Gage.
A/C controls OK (except for A/C
REASON FOR QUESTION
Does A/C test set recovery/
binary switch and A/C
If 34 psi pressure is measured, A/C
recycling manifold system
thermostatic switch).
binary switch is faulty. If not,
low side gage indicate a
A/C receiver/dryer moisture
system charge is low.
indicator indicates no moisture in
pressure of at least 34 psi?
system.
A/C receiver/dryer sight glass
indicates no desiccant
breakdown or oil in system.
Restricted A/C hose.
A/C thermostatic switch OK.
Check system for
No air or other contaminant in A/C
damage and loose
system.
fittings, perform leak test
A/C engine fan control circuit OK.
(WP 0038 00), repair
NO
A/C engine fan control circuit OK.
damage and leaks
A/C condenser OK.
found, replace receiver/
A/C expansion valve OK.
YES
dryer (WP 0054 00), and
A/C system is not overcharged.
replace R-134a
A/C receiver/dryer OK.
(WP 0056 00).
A/C evaporator OK.
A/C compressor OK.
Replace A/C
POSSIBLE PROBLEMS
binary switch
A/C system charge low.
(WP 0044 00).
A/C system leaking.
Verify repair, go to
A/C binary switch faulty.
step 23 of this
repair.
0042 00-28