Piper PA-44-180 SEMINOLE Maintenance Manual page 162

CHART 2104. TROUBLESHOOTING (AIR CONDITIONER)
Trouble
System produces no cooling,
(cont.)
System will not produce
sufficient cooling.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
Causes
Mechanical.
Loose or broken drive belt.
Compressor partially or
completely frozen.
Expansion valve stuck in open
position.
Refrigeration.
Broken refrigerant line.
Leak in system.
Compressor shaft seal leaking.
Clogged screen or screens in
receiver dehydrator or
expansion valve, plugged hose
or coil.
Electrical.
Blower motor sluggish in
operation.
Mechanical.
Compressor clutch slipping.
Obstructed blower passage.
1G18
Remedy
Replace drive belts and/or
tighten to specifications.
Remove compressor for service
or replacement.
Replace expansion valve.
Examine all lines for evidence of
breakage by external stress or
rubbing wear.
Evacuate system, apply static
charge, leak test system, and
repair leak as necessary.
Replace compressor.
Repair as necessary.
Remove blower motor for
service or replacement.
Remove clutch assembly for
service or replacement.
Examine entire passage for
obstruction. Correct as
necessary.
Page 21-51
Revised: May 15, 1989
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