TB-9-2320-279-13-1
TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM
OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS
DECEMBER 2005
TB-9-2320-279-13-1 - Page 162 of 524
TB 9-2320-279-13-1
0014-12
AC COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - Continued
DRAFT
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KNOWN INFO
AC heater/evaporator blower operates.
AC compressor operates.
AC condenser core not blocked or damaged.
AC compressor belts OK.
AC temperature control switch temperature
probe OK.
AC harness wire 1156 OK.
AC condenser assembly harness green wire
OK.
AC condenser motor solenoid ground wire
OK.
AC condenser motor solenoid OK.
AC condenser motor red wire OK.
AC condenser motor ground wire OK.
AC condenser motor OK.
POSSIBLE PROBLEMS
AC condenser assembly harness black wire
faulty.
AC harness wire 1155 faulty.
10.
Are 22 to 28 vdc measured on
AC harness wire 1155 at AC
condenser assembly
connector?
NO
YES
Read WARNING on
page 0014-13.
WARNING
Repair AC harness
wire 1155 (see
Appendix A) or replace
AC wiring harness
(WP 0046).
Verify
repair, go to Step 14 of
this fault.
Repair AC condenser
assembly harness black wire
(see Appendix A).
Verify
repair, go to Step 14 of this
fault.
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TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
If 22 to 28 vdc are measured,
AC condenser assembly
harness black wire is
faulty.
If not, AC harness
wire 1155 is faulty.
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KNOWN INFO
AC heater/evaporator blower operates.
AC compressor operates.
AC condenser core not blocked or damaged.
AC compressor belts OK.
AC temperature control switch temperature
probe OK.
AC condenser motor red wire OK.
AC condenser motor ground wire OK.
AC condenser motor OK.
AC condenser assembly harness black wire
OK.
AC harness wire 1155 OK.
POSSIBLE PROBLEMS
AC harness wire 1156 faulty.
AC condenser assembly harness green wire
faulty.
AC condenser motor solenoid ground wire
faulty.
AC condenser motor solenoid faulty.
11.
Are 22 to 28 vdc measured on
AC harness wire 1156 at AC
condenser assembly
connector, when fan control
switch is set to an on position
and temperature control
switch is set to the coldest
temperature position?
Repair AC harness
wire 1156 (see
Appendix A) or
replace AC wiring
harness (WP 0046).
Verify repair, go to
Step 14 of this fault.
NO
YES
Read WARNING on
page 0014-13.
WARNING
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TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
If 22 to 28 vdc are not
measured, AC harness
wire 1156 is faulty.
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