THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 6
Jun 1/03
2C18
21-50-00
CHART 1 (Sheet 4 of 5)
TROUBLESHOOTING AIR CONDITIONING SYSTEM
Trouble Cause Remedy
System cooling inadequate. (cont.) If refrigeration:
System refrigerant low. Recharge system until
bubbles disappear in
receiver dehydrator
and gauge readings
stabilize to specifications.
Clogged screen in expansion valve. Purge system, replace
expansion valve.
Expansion valve thermal bulb Purge system, replace
has no charge. expansion valve.
Clogged receiver dehydrator Purge system, replace
screen. receiver dehydrator.
Excessive moisture in system. Purge system, replace
receiver dehydrator.
Air in system. Purge, evacuate, and
charge system. (Replace
receiver dehydrator.)
Excessively noisy system. If electrical:
Defective winding or connection Replace or repair as
in compressor clutch coil. necessary.
If mechanical:
Loose or worn drive belts, Tighten or replace as
crankshaft pulley, or idler pulley required.
or bearing.
Engine components such as: Check.
alternator, water pump, valves,
timing or mounts.
Compressor mounting bolts or Check, repair, replace.
brackets - broken or loose.
Compressor oil level low. Fill with proper amount of
specified oil.
Compressor failure. Check shaft turning
smoothness. Remove
compressor for service or
replacement.
Magnetic clutch failure. Check airgap, clutch pulley,
front plate, coil, and
bearing. Adjust, repair, or
replace, as required.
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