Piper Cherokee Six - Page 714

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
TABLE
XIII-IV.
TROUBLESHOOTING
CHART
(AIR
CONDITIONER)
Gauge
Indication
Probable
Causes
Remedy
High
discharge
pressure.
Overcharge
of re-
frigerant.
Purge excess
refrigerant.
Air
in system.
Overheated
condenser
due
to blocking
air
passage.
Flooded
evaporator
indicated
by heavy
frosting
on
suction
line
and
compressor
suction
service
valve.
Restriction
in
liquid
line
from
condenser.
Check
for leaks.
Bleed
charge
from
system.
Evacuate
and recharge
system
13-13 and
13-14.
Clean
bugs and
dirt
from
condenser
fins.
Straighten
fins
if bent.
Check
that capillary
bulb
is securely
clamped
to suction
line.
If capillary
bulb
OK
replace
expansion
valve.
Check
for kinked
hoses
and
stopped
up
filter.
Low discharge
pressure.
Undercharge
of
re-
frigerant.
Sight
glass
shows
bubbles
or foam.
Damaged
compressor
valves
or dirt
under
valves.
Damaged
compressor.
Worn
or
broken
piston
or
piston
rings.
Add
refrigerant
until
bubbles
disappear.
Check
system
leaks
13-9.
13-10
and
3- 11.
Replace
compressor.
13-18.
Replace
compressor.
13-18.
ACCESSORIES
AND
UTILITIES
Revised
11 4 8
3H24