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 158 of 524
TB 9-2320-279-13-1
0014-8
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.
POSSIBLE PROBLEMS
AC condenser motor solenoid faulty.
AC condenser motor red wire faulty.
AC condenser motor ground wire faulty.
AC condenser motor faulty.
AC condenser assembly harness black wire
faulty.
AC harness wire 1155 faulty.
6.
Are 22 to 28 vdc measured on
AC condenser assembly
harness black wire at AC
condenser motor solenoid?
Go to Step 10 of this
fault.
NO
YES
Read WARNING on
page 0014-9.
WARNING
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TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
To isolate system fault.
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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 assembly harness black wire
OK.
AC harness wire 1155 OK.
POSSIBLE PROBLEMS
AC condenser motor solenoid faulty.
AC condenser motor red wire faulty.
AC condenser motor ground wire faulty.
AC condenser motor faulty.
7.
Are 22 to 28 vdc measured on
AC condenser motor solenoid,
terminal red wire, when fan
control switch is set to an on
position and temperature
control switch is set to the
coldest temperature position?
Replace AC
condenser motor
solenoid (WP 0027).
Verify repair, go to
Step 14 of this fault.
NO
YES
Read WARNING on
page 0014-9.
WARNING
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TEST OPTIONS
Voltage test.
Multimeter.
REASON FOR QUESTION
If 22 to 28 vdc are not
measured, AC condenser
motor solenoid is faulty.
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