TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
7.
KNOWN INFO
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-13.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Is system low-side pressure
binary switch and A/C
cycling between 23 and 30 psi
thermostatic switch).
when A/C compressor
A/C receiver/dryer moisture
TEST OPTIONS
indicator indicates no moisture in
cycles?
Pressure Test.
system.
A/C binary switch OK.
REASON FOR QUESTION
A/C receiver/dryer sight glass
If system low side pressure does
indicates no desiccant
not cycle between 23 and 30 psi,
breakdown or oil in system.
A/C thermostatic switch is faulty.
A/C system charge is not low.
A/C engine fan control circuit OK.
Replace A/C
A/C condenser OK.
thermostatic switch
NO
A/C expansion valve OK.
(WP 0031 00). Verify
A/C system is not overcharged.
repair, go to Step 23 of
A/C receiver/dryer OK.
this fault.
A/C evaporator OK.
YES
A/C compressor OK.
A/C hoses are not restricted.
POSSIBLE PROBLEMS
A/C thermostatic switch faulty.
Air or other contamination in A/C
system.
A/C system leaking.
KNOWN INFO
8.
WARNING
Read WARNING on
TEST OPTIONS
Power to A/C system OK.
page 0042 00-13.
A/C circuit wiring OK.
Visual Inspection.
A/C controls OK (except for A/C
REASON FOR QUESTION
Does A/C system provide
binary switch and A/C
adequate cooling?
thermostatic switch).
If A/C system does not cool
A/C receiver/dryer moisture
adequately, air or other
indicator indicates no moisture in
contaminant may have entered
system.
system.
A/C binary switch OK.
A/C receiver/dryer sight glass
indicates no desiccant
breakdown or oil in system.
A/C system charge is not low.
Perform leak test (WP 0038
A/C engine fan control circuit OK.
00). Repair any leaks
A/C condenser OK.
found, and replace
NO
A/C expansion valve OK.
A/C receiver/dryer (WP
A/C system is not overcharged.
A/C receiver/dryer OK.
0056 00). Verify repair, go
A/C evaporator OK.
YES
to Step 23 of this fault.
A/C compressor OK.
A/C hoses are not restricted.
A/C thermostatic switch OK.
POSSIBLE PROBLEMS
Go to Step 23
of this fault.
Air or other contaminant in A/C
system.
A/C system leaking.
0042 00-12