Piper Navajo Chieftain PA-31-350 Service Manual page 917

NAVAJO CHEIFTAIN SERVICE MANUAL
TABLE XIV-XV. TROUBLESHOOTING
CHART (AIR CONDITIONER) (cont)
Trouble
Cause Remedy
Refrigeration (cont.)
System produces
no cooling.(cont.)
Compressor shaft
seal leaking.
Replace compressor
shaft seal.
Clogged screen
or screens in
receiver dehydra-
tor or expansion
valve; plugged
hose or coil.
Repair as necessary.
NOTE
After completing repairs of any above causes. the system must have the dehydrator
replaced. Then the complete system must be purged. evacuated. and recharged to
remove excess moisture.
System will not
produce sufficient
cooling.
Electrical
Circulating fan
motor sluggish
in operation.
Remove fan motor
for service or
replacement.
Mechanical
Compressor clutch
slipping.
Obstructed blower
passage.
Insufficient air
circulation over
condenser coils;
fins clogged with
dirt or bugs.
Remove clutch
assembly for ser-
vice or replace-
ment.
Examine entire
passage for ob-
struction. Correct
as necessary.
Clean condenser.
coils.
Reissued: 9/23/80
411
ACCESSORIES AND UTILITIES