Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 163 / 881

PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 5 1 - 0 2
Page 21-52
Revised: May 15, 1989
1G19
CHART 2104. TROUBLESHOOTING (AIR CONDITIONER)
Trouble Causes Remedy
System will not produce Electrical (cont.)
sufficient cooling. (cont.)
Insufficient air circulation over Clean condenser coils.
condenser coils, fins clogged
with dirt or bugs.
Evaporator filter clogged. Clean with cleaning solvent to
remove cigarette tars.
Refrigeration.
Insufficient refrigerant in Recharge system until bubbles
system. disappear in receiver dehydrator
and gauge readings stabilize to
specifications.
Clogged screen in expansion Purge system and replace
valve. expansion valve.
Expansion valve thermal bulb Purge system, replace expansion
has lost charge. valve.
Clogged screen in receiver Purge system; replace receiver
dehydrator. dehydrator.
Excessive moisture in system. Purge system; replace receiver
dehydrator.
Air in system. Purge, evacuate and charge
system (Replace receiver
dehydrator.)
Excessively noisy system. Electrical.
Defective winding or improper Replace or repair as necessary.
connection in compressor.
clutch coil.
Mechanical.
Loose or excessively worn drive Tighten or replace as required.
belts.
Noisy clutch. Remove clutch for service or
replacement as necessary.
PIPER AIRCRAFT