TB 9-2320-360-13&P-1
A/C COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - CONTINUED.
2.
WARNING
KNOWN INFO
Read WARNING on
A/C operates.
page 0019 00-5.
magnetic switch (R31) supply and
control circuit OK.
Does A/C hose at output of A/
Air supply to engine fan control
C condenser get hot during
OK.
system operation?
A/C condenser not blocked with
TEST OPTIONS
debris.
Visual Inspection.
POSSIBLE PROBLEMS
REASON FOR QUESTION
A/C engine fan control solenoid
To isolate system fault.
black wire faulty.
A/C engine fan control solenoid
faulty.
A/C engine fan control solenoid
circuit breaker faulty.
Go to Step 8 of this
A/C engine fan control solenoid 12
NO
fault.
vdc supply circuit wiring faulty.
A/C engine fan control solenoid
valve faulty.
YES
A/C high pressure switch shorted.
A/C thermostatic switch
temperature probe installed
incorrectly.
A/C thermostatic switch faulty.
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING on
A/C operates.
Audible Inspection.
page 0019 00-5.
magnetic switch (R31) supply and
REASON FOR QUESTION
control circuit OK.
Is air pressure present at A/C
If air pressure is present when A/C
Air supply to engine fan control
engine fan control solenoid
engine fan control solenoid is
OK.
closed, engine fan may not
valve, when A/C compressor
A/C condenser not blocked with
engage.
receiver/dryer harness
debris.
A/C high pressure switch not
connector terminals at A/C
shorted.
high pressure switch are
A/C thermostatic switch
jumped?
temperature probe installed
correctly.
A/C thermostatic switch OK.
POSSIBLE PROBLEMS
Go to Step 7
A/C engine fan control solenoid
NO
of this fault.
black wire faulty.
A/C engine fan control solenoid
faulty.
YES
A/C engine fan control solenoid
circuit breaker faulty.
A/C engine fan control solenoid 12
vdc supply circuit wiring faulty.
A/C engine fan control solenoid
valve faulty.
0019 00-4