TB 9-2320-360-13&P-1
A/C COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - CONTINUED.
8.
KNOWN INFO
WARNING
Read WARNING on
A/C operates.
page 0019 00-11.
magnetic switch (R31) supply and
control circuit OK.
Is an open measured across
Air supply to engine fan control
OK.
A/C high pressure switch,
A/C condenser not blocked with
when switch is removed from
TEST OPTIONS
debris.
system?
Continuity test.
A/C engine fan control solenoid
black wire OK.
A/C engine fan control solenoid
REASON FOR QUESTION
OK.
If continuity is measured, A/C high
A/C engine fan control solenoid
pressure switch is faulty.
circuit breaker OK.
A/C engine fan control solenoid 12
Replace A/C high
vdc supply circuit wiring OK.
pressure switch
NO
A/C engine fan control solenoid
(WP 0029 00). Verify
valve OK.
repair, go to Step 10
POSSIBLE PROBLEMS
of this fault.
YES
A/C high pressure switch shorted.
A/C thermostatic switch
temperature probe installed
incorrectly.
A/C thermostatic switch faulty.
9.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING on
A/C operates.
Visual Inspection.
page 0019 00-11.
magnetic switch (R31) supply and
REASON FOR QUESTION
control circuit OK.
If A/C thermostatic switch
Air supply to engine fan control
Is A/C thermostatic switch
temperature probe is installed
OK.
temperature probe installed
incorrectly or is faulty, A/C
A/C condenser not blocked with
correctly?
compressor may not shut off or
debris.
may cycle constantly.
A/C engine fan control solenoid
black wire OK.
A/C engine fan control solenoid
OK.
A/C engine fan control solenoid
circuit breaker OK.
A/C engine fan control solenoid 12
Reinstall A/C
vdc supply circuit wiring OK.
thermostatic switch
NO
A/C engine fan control solenoid
temperature probe (WP
valve OK.
0031 00). Verify repair,
A/C high pressure switch OK.
go to Step 10 of this fault.
POSSIBLE PROBLEMS
YES
A/C thermostatic switch
Replace A/C thermostatic
temperature probe installed
switch temperature probe
incorrectly.
(WP 0031 00). Verify
A/C thermostatic switch faulty.
repair, go to Step 10 of
this fault.
0019 00-10
