Piper Dakota Maintenance Manual page 135

CHART 2102. TROUBLESHOOTING (AIR CONDITIONING SYSTEM) (cont.)
Trouble
System will not produce
sufficient cooling. (cont)
Excessively noisy system.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
Cause
Refrigeration
Insufficient refrigerant in
system.
Clogged screen in expan-
sion valve.
Expansion valve thermal
bulb has lost charge.
Clogged screen in receiver
dehydrator.
Excessive moisture in
system.
Air in system.
Electrical
Defective winding or im-
proper connection in com-
pressor clutch coil.
Mechanical
Loose or excessively worn
drive belts.
Noisy clutch.
1F22
Remedy
Recharge system until bub
bles disappear in receiver
dehydrator and gauge read-
ings stabilize to specifi-
cations.
Purge system and replace
expansion valve.
Purge system; replace ex-
pansion valve.
Purge system; replace re-
ceiver dehydrator.
Purge system; replace re-
ceiver dehydrator.
Purge, evacuate and charge
system. (Replace receiver
dehydrator)
Replace or repair as nec-
essary.
Tighten or replace as re-
quired.
Remove clutch for service or
replacement as necessary.
21 - 52 - 00
Page - 21 - 08
Reissued: August 1, 1986