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 146 of 524
TB 9-2320-279-13-1
0013-4
AC COMPRESSOR EXCESSIVELY NOISY - Continued
DRAFT
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KNOWN INFO
AC operates.
AC compressor not damaged.
POSSIBLE PROBLEMS
AC compressor belts loose or damaged.
AC compressor mounting bracket damaged
or hardware missing or loose.
AC compressor faulty.
2.
Are AC compressor belts
tight and free from damage?
Tighten or replace
AC compressor
belts as required
(WP 0022).
Verify
repair, go to Step 4
of this fault.
NO
YES
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TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
If AC compressor belts are
loose or damaged, AC
compressor may be
excessively noisy.
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KNOWN INFO
AC operates.
AC compressor not damaged.
AC compressor belts OK.
POSSIBLE PROBLEMS
AC compressor mounting bracket damaged
or hardware missing or loose.
AC compressor faulty.
3.
Is AC compressor mounting
bracket hardware secure and
free from damage?
Tighten or replace
loose, missing, or
damaged hardware
(WP 0023).
Verify
repair, go to Step 4 of
this fault.
NO
YES
Recover R-134a refrigerant
(WP 0050).
Flush system
(WP 0050).
Then replace AC
compressor (WP 0023) and AC
condenser dryer (WP 0025).
Evacuate and charge system
with new R-134a refrigerant
(WP 0050).
Verify repair, go to
Step 4 of this fault.
Read WARNING on
page 0013-5.
WARNING
TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
If AC compressor mounting
bracket hardware is
damaged, loose, or
missing, or AC
compressor is damaged
internally, AC compressor
may be excessively noisy.
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